Error installing MtoA for Maya 2018.3.0

[jpolkVFNE7]

Download "MtoA 2018" for Linux from this link:

https://www.arnoldrenderer.com/arnold/download/product-download/?id=3131

Installing as root, after typing 'accept' and '1' got:

--== Maya to Arnold Installer ==--
Traceback (most recent call last):
File "./unix_installer.py", line 119, in <module>
installDir = os.path.join('/usr', 'autodesk', 'arnold', 'maya{}'.format(mayaVersion))
ValueError: zero length field name in format

Our studio location for Maya 2018.3.0 is:

/usr/apps/maya/maya-2018.3.0/

Thoughts or advice?

Thank you,

Btw, we don't normally use Maya plugin, we normally render via Arnold Core.

[jpolkVFNE7]

I also tried option '2' using '--keep' flag...and unzipped 'package.zip' locally.

I copied the results to live in our location /usr/apps/mtoa/maya2018/ and

launched Maya (2018.3.0). Unfortunately, when trying to load mtoa.so via Maya's

Plugin Manager, I got a range of error messages printed to the console (see below).

PYTHONPATH is pointed to "/usr/apps/arnold/arnold-5.4.0.2/python".

Thank you,

Here are err mesgs:

#--------------------------

exec command:

API error detected in plugins/mtoa/extension/PxMayaNode.cpp at line 469
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/PxMayaNode.cpp at line 469
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/PxMayaNode.cpp at line 469
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/PxMayaNode.cpp at line 469
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/extension/ExtensionsManager.cpp at line 719
: (kFailure): Unexpected Internal Failure

API error detected in plugins/mtoa/Main.cpp at line 1290
: (kFailure): Unexpected Internal Failure
00:00:00 744MB ERROR | Failed to import python module 'mtoa'

[jpolkVFNE7]

Setting MAYA_MODULE_PATH and MAYA_RENDER_DESC_PATH to where 'mtoa.mod' lives

(https://docs.arnoldrenderer.com/display/A5AFMUG/Installing+Arnold+for+Maya+on+Linux)

I was able to load 'mtoa.so' in the Plugin Mgr. However, when I went to Render Settings and set the renderer to Arnold, Maya crashed.

[jpolkVFNE7]

Also, before setting Env Vars, I had found that 'mtoa.mod' contained a filepath reference that starts with 'jenkins'

>>> more mtoa.mod
+ mtoa any /jenkins/workspace/Arnold-MTOA_Build_LINUX/MTOA_DEPLOY
PATH +:= bin
MAYA_CUSTOM_TEMPLATE_PATH +:= scripts/mtoa/ui/templates

I replaced the 'jenkins' path to where the extracted MtoA 4.0.1 is located:

>>> more mtoa.mod
+ mtoa any /usr/apps/mtoa/maya2018/4.0.1
PATH +:= bin
MAYA_CUSTOM_TEMPLATE_PATH +:= scripts/mtoa/ui/templates

[Stephen.Blair · Accepted solution]

You use Python 2.6? That's the problem.

It's because line 119 isn't compatible with Python 2.6

installDir = os.path.join('/usr', 'autodesk', 'arnold','maya{}'.format(mayaVersion)) ValueError: zero length field name in format

https://stackoverflow.com/questions/21034954/valueerror-zero-length-field-name-in-format-in-python2-...

For Python 2.6, it has to be maya{0} not maya{}

This will be fixed in the next bugfix release.

For now, you have to either use a newer Python or fix the install script.

Extracting the files by unzipped 'package.zip' locally never works, because there's a bunch of Python files that are not created (init.py iirc, I'd have to check, haven't seen this in years)

[jpolkVFNE7]

Ahhhh, lol, okay....We have Python 2.7 too...can I modify unix_installer.py and point it to py27 somehow? Or other suggestions?

Thank you,

[jpolkVFNE7]

Oh, or modify unix_installer.sh and replace 'python' with 'python2.7' ?

[jpolkVFNE7]

ahh, modifying unix_installer.sh and inserting 'python27' there...installation worked. Testing now...

[jpolkVFNE7]

Maya 2018.3.0's Plugin Mgr found it automatically, I clicked 'load' and it loaded.

Then again, went to Render Settings, set renderer to Arnold and Maya crashed again.

[jpolkVFNE7]

Ahh, that last step was my bad....it was picking up an older libai.so

It is working now 😄

Clicking on 'mtoa.so' loads and when I go to Render Settings, Arnold is already set as renderer.

THank you very much, Stephen