Mailing List Archive: Error when trying to start up a domU

Error when trying to start up a domU

Jul 10, 2007, 9:27 AM

Post #1 of 3 (883 views)

First of all, thanks to Tom for hands on and psychological support offlist :)

I have successfully created a local VDI, a VM and a VBD. I am stuck
with the following error:

xmlrpc failed! ErrorDescription: coercing to Unicode: need string or
buffer, NoneType found -> INTERNAL_ERROR

Detailed procedure log:

The constructors used to create the VDI was
(54b789c9-969a-dee5-32b7-94ea46c61b7b is the local one you can abuse
to access local files):

my %vdi_constructor2 = ( 'name_label' => 'generic label',
'name_description' => '',
'virtual_size' => '4194304000',
'SR' => '54b789c9-969a-dee5-32b7-94ea46c61b7b',
'other_config' => ('location' =>
'/root/test_image_070710_15'),
);

The VM constructor:

my %vm_constructor = ( 'name_label' => '070710_15',
'name_description' => 'mein ding halt',
'user_version' => '123',
'is_a_template' => '0',
'auto_power_on' => '0',
'memory_static_max' => '512000000',
'memory_static_min' => '512000000',
'memory_dynamic_max' => '512000000',
'memory_dynamic_min' => '512000000',
'VCPUs_max' => '1',
'VCPUs_at_startup' => '1',
);

my %vbd_constructor = ( 'VDI' => '844b162a-5a04-c4f9-8196-027de5826c95',
'VM' => 'd4a27090-1205-76f4-06a3-89d23c677adf',
'device' => '/dev/sda',
'bootable' => '1',
);

This results in the following:

/var/lib/xend/domains/d4a27090-1205-76f4-06a3-89d23c677adf/config.sxp

(domain
(vcpus_params ())
(PV_args )
(PV_bootloader )
(name_description 'mein ding halt')
(VCPUs_live 1)
(actions_after_crash restart)
(uuid d4a27090-1205-76f4-06a3-89d23c677adf)
(PV_ramdisk )
(name_label 070710_15)
(VCPUs_at_startup 1)
(HVM_boot_params ())
(platform ())
(PV_kernel )
(memory_static_min 512000000)
(HVM_boot_policy )
(VCPUs_max 1)
(memory_static_max 512000000)
(actions_after_shutdown destroy)
(memory_dynamic_max 512000000)
(user_version 123)
(is_a_template False)
(memory_dynamic_min 512000000)
(PV_bootloader_args )
(other_config ())
(actions_after_reboot restart)
(on_crash restart)
(uuid d4a27090-1205-76f4-06a3-89d23c677adf)
(bootloader_args )
(vcpus 1)
(name 070710_15)
(on_poweroff destroy)
(on_reboot restart)
(bootloader )
(maxmem 488)
(memory 488)
(shadow_memory 0)
(vcpu_avail 1)
(cpu_weight 256)
(cpu_cap 0)
(features )
(on_xend_start ignore)
(on_xend_stop ignore)
(image (linux (kernel )))
(status 0)
(device
(vbd
(uuid d40c4167-c578-4b7c-d5b4-f426460f6c2e)
(bootable 1)
(driver )
(dev /dev/sda:disk)
(uname /root/test_image_070710_15)
(mode r)
(VDI 844b162a-5a04-c4f9-8196-027de5826c95)
(type Disk)
)
)
)

When trying to VM.start the machine with

VM.start, $session_ref, $vm_ref, 0

I get

xmlrpc failed! ErrorDescription: coercing to Unicode: need string or
buffer, NoneType found -> INTERNAL_ERROR

xend.log says

[2007-07-10 18:18:15 15751] DEBUG (__init__:1072) XendDomainInfo.constructDomain
[2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Balloon: 6994876 KiB
free; need 2048; done.
[2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Adding Domain: 8
[2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
XendDomainInfo.initDomain: 8 256
[2007-07-10 18:18:15 15751] ERROR (__init__:1072) VM start failed
Traceback (most recent call last):
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 396, in start
XendTask.log_progress(31, 60, self._initDomain)
File "//usr/lib/python/xen/xend/XendTask.py", line 209, in log_progress
retval = func(*args, **kwds)
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1470, in _initDomain
self._configureBootloader()
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1824, in
_configureBootloader
bootloader_args, kernel, ramdisk, args)
File "//usr/lib/python/xen/xend/XendBootloader.py", line 41, in bootloader
if not os.access(disk, os.R_OK):
TypeError: coercing to Unicode: need string or buffer, NoneType found
[2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
XendDomainInfo.destroy: domid=8
[2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
XendDomainInfo.destroyDomain(8)
[2007-07-10 18:18:15 15751] ERROR (__init__:1072) Internal error
handling VM.start
Traceback (most recent call last):
File "//usr/lib/python/xen/util/xmlrpclib2.py", line 131, in
_marshaled_dispatch
response = self._dispatch(method, params)
File "SimpleXMLRPCServer.py", line 406, in _dispatch
return func(*params)
File "//usr/lib/python/xen/xend/XendAPI.py", line 219, in f
return func(self, *args, **kwargs)
File "//usr/lib/python/xen/xend/XendAPI.py", line 254, in check_session
return func(self, session, *args, **kwargs)
File "//usr/lib/python/xen/xend/XendAPI.py", line 310, in <lambda>
'VM', func, *args, **kwargs)
File "//usr/lib/python/xen/xend/XendAPI.py", line 266, in _check_ref
return func(api, session, ref, *args, **kwargs)
File "//usr/lib/python/xen/xend/XendAPI.py", line 1681, in VM_start
start_paused = start_paused)
File "//usr/lib/python/xen/xend/XendTask.py", line 209, in log_progress
retval = func(*args, **kwds)
File "//usr/lib/python/xen/xend/XendAPI.py", line 447, in do_vm_func
xendom.do_legacy_api_with_uuid(fn, vm_ref, *args, **kwargs)
File "//usr/lib/python/xen/xend/XendDomain.py", line 700, in
do_legacy_api_with_uuid
fn(dom, *args, **kwargs)
File "//usr/lib/python/xen/xend/XendDomain.py", line 985, in domain_start
dominfo.start(is_managed = True)
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 396, in start
XendTask.log_progress(31, 60, self._initDomain)
File "//usr/lib/python/xen/xend/XendTask.py", line 209, in log_progress
retval = func(*args, **kwds)
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1470, in _initDomain
self._configureBootloader()
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1824, in
_configureBootloader
bootloader_args, kernel, ramdisk, args)
File "//usr/lib/python/xen/xend/XendBootloader.py", line 41, in bootloader
if not os.access(disk, os.R_OK):
TypeError: coercing to Unicode: need string or buffer, NoneType found

I have no idea what else I could look at or try. Any help appreciated.

If you need more info, ask and I will happy to provide it :)
Richard

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xen-api@lists.xensource.com
http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-api

Re: Error when trying to start up a domU [ In reply to ]

saurabh.g.garg at oracle

Jul 10, 2007, 10:11 AM

Post #2 of 3 (853 views)

Permalink

Hi,

1. Set the pv_kernel to the kernel (xen domU or any other that you are
using, for example "/boot/vmlinuz-2.6-xen") file location on dom0 "<file>".

2. While setting the other_config->location for the vdi, you should be
using either file://<file> or tap:aio://<file> {if the tap drivers are
available).

3. Also, set the appropriate pv_args property with the vm (to specify
the location of the root partition, in your case set it to "root=/dev/sda").

I hope that should get you going.

Thanks,
Saurabh.

Richard Hartmann wrote:
> First of all, thanks to Tom for hands on and psychological support
> offlist :)
>
> I have successfully created a local VDI, a VM and a VBD. I am stuck
> with the following error:
>
> xmlrpc failed! ErrorDescription: coercing to Unicode: need string or
> buffer, NoneType found -> INTERNAL_ERROR
>
>
> Detailed procedure log:
>
> The constructors used to create the VDI was
> (54b789c9-969a-dee5-32b7-94ea46c61b7b is the local one you can abuse
> to access local files):
>
> my %vdi_constructor2 = ( 'name_label' => 'generic label',
> 'name_description' => '',
> 'virtual_size' => '4194304000',
> 'SR' => '54b789c9-969a-dee5-32b7-94ea46c61b7b',
> 'other_config' => ('location' =>
> '/root/test_image_070710_15'),
> );
>
> The VM constructor:
>
> my %vm_constructor = ( 'name_label' => '070710_15',
> 'name_description' => 'mein ding halt',
> 'user_version' => '123',
> 'is_a_template' => '0',
> 'auto_power_on' => '0',
> 'memory_static_max' => '512000000',
> 'memory_static_min' => '512000000',
> 'memory_dynamic_max' => '512000000',
> 'memory_dynamic_min' => '512000000',
> 'VCPUs_max' => '1',
> 'VCPUs_at_startup' => '1',
> );
>
> my %vbd_constructor = ( 'VDI' => '844b162a-5a04-c4f9-8196-027de5826c95',
> 'VM' => 'd4a27090-1205-76f4-06a3-89d23c677adf',
> 'device' => '/dev/sda',
> 'bootable' => '1',
> );
>
> This results in the following:
>
> /var/lib/xend/domains/d4a27090-1205-76f4-06a3-89d23c677adf/config.sxp
>
> (domain
> (vcpus_params ())
> (PV_args )
> (PV_bootloader )
> (name_description 'mein ding halt')
> (VCPUs_live 1)
> (actions_after_crash restart)
> (uuid d4a27090-1205-76f4-06a3-89d23c677adf)
> (PV_ramdisk )
> (name_label 070710_15)
> (VCPUs_at_startup 1)
> (HVM_boot_params ())
> (platform ())
> (PV_kernel )
> (memory_static_min 512000000)
> (HVM_boot_policy )
> (VCPUs_max 1)
> (memory_static_max 512000000)
> (actions_after_shutdown destroy)
> (memory_dynamic_max 512000000)
> (user_version 123)
> (is_a_template False)
> (memory_dynamic_min 512000000)
> (PV_bootloader_args )
> (other_config ())
> (actions_after_reboot restart)
> (on_crash restart)
> (uuid d4a27090-1205-76f4-06a3-89d23c677adf)
> (bootloader_args )
> (vcpus 1)
> (name 070710_15)
> (on_poweroff destroy)
> (on_reboot restart)
> (bootloader )
> (maxmem 488)
> (memory 488)
> (shadow_memory 0)
> (vcpu_avail 1)
> (cpu_weight 256)
> (cpu_cap 0)
> (features )
> (on_xend_start ignore)
> (on_xend_stop ignore)
> (image (linux (kernel )))
> (status 0)
> (device
> (vbd
> (uuid d40c4167-c578-4b7c-d5b4-f426460f6c2e)
> (bootable 1)
> (driver )
> (dev /dev/sda:disk)
> (uname /root/test_image_070710_15)
> (mode r)
> (VDI 844b162a-5a04-c4f9-8196-027de5826c95)
> (type Disk)
> )
> )
> )
>
>
> When trying to VM.start the machine with
>
> VM.start, $session_ref, $vm_ref, 0
>
> I get
>
> xmlrpc failed! ErrorDescription: coercing to Unicode: need string or
> buffer, NoneType found -> INTERNAL_ERROR
>
> xend.log says
>
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.constructDomain
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Balloon: 6994876 KiB
> free; need 2048; done.
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Adding Domain: 8
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.initDomain: 8 256
> [2007-07-10 18:18:15 15751] ERROR (__init__:1072) VM start failed
> Traceback (most recent call last):
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 396, in start
> XendTask.log_progress(31, 60, self._initDomain)
> File "//usr/lib/python/xen/xend/XendTask.py", line 209, in log_progress
> retval = func(*args, **kwds)
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1470, in
> _initDomain
> self._configureBootloader()
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1824, in
> _configureBootloader
> bootloader_args, kernel, ramdisk, args)
> File "//usr/lib/python/xen/xend/XendBootloader.py", line 41, in
> bootloader
> if not os.access(disk, os.R_OK):
> TypeError: coercing to Unicode: need string or buffer, NoneType found
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.destroy: domid=8
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.destroyDomain(8)
> [2007-07-10 18:18:15 15751] ERROR (__init__:1072) Internal error
> handling VM.start
> Traceback (most recent call last):
> File "//usr/lib/python/xen/util/xmlrpclib2.py", line 131, in
> _marshaled_dispatch
> response = self._dispatch(method, params)
> File "SimpleXMLRPCServer.py", line 406, in _dispatch
> return func(*params)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 219, in f
> return func(self, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 254, in check_session
> return func(self, session, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 310, in <lambda>
> 'VM', func, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 266, in _check_ref
> return func(api, session, ref, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 1681, in VM_start
> start_paused = start_paused)
> File "//usr/lib/python/xen/xend/XendTask.py", line 209, in log_progress
> retval = func(*args, **kwds)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 447, in do_vm_func
> xendom.do_legacy_api_with_uuid(fn, vm_ref, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendDomain.py", line 700, in
> do_legacy_api_with_uuid
> fn(dom, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendDomain.py", line 985, in
> domain_start
> dominfo.start(is_managed = True)
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 396, in start
> XendTask.log_progress(31, 60, self._initDomain)
> File "//usr/lib/python/xen/xend/XendTask.py", line 209, in log_progress
> retval = func(*args, **kwds)
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1470, in
> _initDomain
> self._configureBootloader()
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1824, in
> _configureBootloader
> bootloader_args, kernel, ramdisk, args)
> File "//usr/lib/python/xen/xend/XendBootloader.py", line 41, in
> bootloader
> if not os.access(disk, os.R_OK):
> TypeError: coercing to Unicode: need string or buffer, NoneType found
>
>
> I have no idea what else I could look at or try. Any help appreciated.
>
>
> If you need more info, ask and I will happy to provide it :)
> Richard
>
> _______________________________________________
> xen-api mailing list
> xen-api@lists.xensource.com
> http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-api

_______________________________________________
xen-api mailing list
xen-api@lists.xensource.com
http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-api

Re: Error when trying to start up a domU [ In reply to ]

stefanb at us

Jul 10, 2007, 10:22 AM

Post #3 of 3 (868 views)

Permalink

xen-api-bounces@lists.xensource.com wrote on 07/10/2007 12:27:24 PM:

> First of all, thanks to Tom for hands on and psychological support
offlist :)
>
> I have successfully created a local VDI, a VM and a VBD. I am stuck
> with the following error:
>
> xmlrpc failed! ErrorDescription: coercing to Unicode: need string or
> buffer, NoneType found -> INTERNAL_ERROR
>
>
> Detailed procedure log:
>
> The constructors used to create the VDI was
> (54b789c9-969a-dee5-32b7-94ea46c61b7b is the local one you can abuse
> to access local files):
>
> my %vdi_constructor2 = ( 'name_label' => 'generic label',
> 'name_description' => '',
> 'virtual_size' => '4194304000',
> 'SR' => '54b789c9-969a-dee5-32b7-94ea46c61b7b',
> 'other_config' => ('location' =>
> '/root/test_image_070710_15'),
> );
>
> The VM constructor:
>
> my %vm_constructor = ( 'name_label' => '070710_15',
> 'name_description' => 'mein ding halt',
> 'user_version' => '123',
> 'is_a_template' => '0',
> 'auto_power_on' => '0',
> 'memory_static_max' => '512000000',
> 'memory_static_min' => '512000000',
> 'memory_dynamic_max' => '512000000',
> 'memory_dynamic_min' => '512000000',
> 'VCPUs_max' => '1',
> 'VCPUs_at_startup' => '1',
> );

Does this VM start without the VDI/VBD? Can you give it a ramdisk to
start? I would say you have to give it more parameters.

I remember having had similar problem until I specified
action_after_shutdown, actions_after_crash, actions_after_reboot and
actions_after_suspend. You should give the first 3 a value of '0' and the
last one a "destroy" (might be a bug in the API...). Set PV_bootloader to
"", give it a PV_kernel (the one domain-0 booted with for example
including the whole path, i.e. /boot/vmlinuz-2.6.18) and PV_ramdisk (also
the one that domain-0 booted with). I set PV_args to "". Once that works
- I hope it does - try to add VBD and VDI...

Stefan

>
> my %vbd_constructor = ( 'VDI' => '844b162a-5a04-c4f9-8196-027de5826c95',
> 'VM' => 'd4a27090-1205-76f4-06a3-89d23c677adf',
> 'device' => '/dev/sda',
> 'bootable' => '1',
> );
>
> This results in the following:
>
> /var/lib/xend/domains/d4a27090-1205-76f4-06a3-89d23c677adf/config.sxp
>
> (domain
> (vcpus_params ())
> (PV_args )
> (PV_bootloader )
> (name_description 'mein ding halt')
> (VCPUs_live 1)
> (actions_after_crash restart)
> (uuid d4a27090-1205-76f4-06a3-89d23c677adf)
> (PV_ramdisk )
> (name_label 070710_15)
> (VCPUs_at_startup 1)
> (HVM_boot_params ())
> (platform ())
> (PV_kernel )
> (memory_static_min 512000000)
> (HVM_boot_policy )
> (VCPUs_max 1)
> (memory_static_max 512000000)
> (actions_after_shutdown destroy)
> (memory_dynamic_max 512000000)
> (user_version 123)
> (is_a_template False)
> (memory_dynamic_min 512000000)
> (PV_bootloader_args )
> (other_config ())
> (actions_after_reboot restart)
> (on_crash restart)
> (uuid d4a27090-1205-76f4-06a3-89d23c677adf)
> (bootloader_args )
> (vcpus 1)
> (name 070710_15)
> (on_poweroff destroy)
> (on_reboot restart)
> (bootloader )
> (maxmem 488)
> (memory 488)
> (shadow_memory 0)
> (vcpu_avail 1)
> (cpu_weight 256)
> (cpu_cap 0)
> (features )
> (on_xend_start ignore)
> (on_xend_stop ignore)
> (image (linux (kernel )))
> (status 0)
> (device
> (vbd
> (uuid d40c4167-c578-4b7c-d5b4-f426460f6c2e)
> (bootable 1)
> (driver )
> (dev /dev/sda:disk)
> (uname /root/test_image_070710_15)
> (mode r)
> (VDI 844b162a-5a04-c4f9-8196-027de5826c95)
> (type Disk)
> )
> )
> )
>
>
> When trying to VM.start the machine with
>
> VM.start, $session_ref, $vm_ref, 0
>
> I get
>
> xmlrpc failed! ErrorDescription: coercing to Unicode: need string or
> buffer, NoneType found -> INTERNAL_ERROR
>
> xend.log says
>
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) XendDomainInfo.
> constructDomain
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Balloon: 6994876 KiB
> free; need 2048; done.
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Adding Domain: 8
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.initDomain: 8 256
> [2007-07-10 18:18:15 15751] ERROR (__init__:1072) VM start failed
> Traceback (most recent call last):
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 396, in start
> XendTask.log_progress(31, 60, self._initDomain)
> File "//usr/lib/python/xen/xend/XendTask.py", line 209, in
log_progress
> retval = func(*args, **kwds)
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1470, in
> _initDomain
> self._configureBootloader()
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1824, in
> _configureBootloader
> bootloader_args, kernel, ramdisk, args)
> File "//usr/lib/python/xen/xend/XendBootloader.py", line 41, in
bootloader
> if not os.access(disk, os.R_OK):
> TypeError: coercing to Unicode: need string or buffer, NoneType found
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.destroy: domid=8
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.destroyDomain(8)
> [2007-07-10 18:18:15 15751] ERROR (__init__:1072) Internal error
> handling VM.start
> Traceback (most recent call last):
> File "//usr/lib/python/xen/util/xmlrpclib2.py", line 131, in
> _marshaled_dispatch
> response = self._dispatch(method, params)
> File "SimpleXMLRPCServer.py", line 406, in _dispatch
> return func(*params)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 219, in f
> return func(self, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 254, in
check_session
> return func(self, session, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 310, in <lambda>
> 'VM', func, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 266, in _check_ref
> return func(api, session, ref, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 1681, in VM_start
> start_paused = start_paused)
> File "//usr/lib/python/xen/xend/XendTask.py", line 209, in
log_progress
> retval = func(*args, **kwds)
> File "//usr/lib/python/xen/xend/XendAPI.py", line 447, in do_vm_func
> xendom.do_legacy_api_with_uuid(fn, vm_ref, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendDomain.py", line 700, in
> do_legacy_api_with_uuid
> fn(dom, *args, **kwargs)
> File "//usr/lib/python/xen/xend/XendDomain.py", line 985, in
domain_start
> dominfo.start(is_managed = True)
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 396, in start
> XendTask.log_progress(31, 60, self._initDomain)
> File "//usr/lib/python/xen/xend/XendTask.py", line 209, in
log_progress
> retval = func(*args, **kwds)
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1470, in
> _initDomain
> self._configureBootloader()
> File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 1824, in
> _configureBootloader
> bootloader_args, kernel, ramdisk, args)
> File "//usr/lib/python/xen/xend/XendBootloader.py", line 41, in
bootloader
> if not os.access(disk, os.R_OK):
> TypeError: coercing to Unicode: need string or buffer, NoneType found
>
>
> I have no idea what else I could look at or try. Any help appreciated.
>
>
> If you need more info, ask and I will happy to provide it :)
> Richard
>
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