CentOS 7 Connect No Qt Binding Were Found

[AnthonyM]

On a fresh install of CentOS 7.4 I can't run Connect. After the first failure I installed PyQt4, PySide2, and qt4 but still happens.

Traceback (most recent call last):
  File "/home/anthony/Downloads/ftrack-connect-package/library.zip/cx_Freeze__init__.py", line 29, in <module>
  File "/home/anthony/Downloads/ftrack-connect-package/library.zip/ftrack_connect_package__main__.py", line 108, in <module>
  File "/home/anthony/Downloads/ftrack-connect-package/common.zip/ftrack_connect/__main__.py", line 14, in <module>
  File "build/bdist.linux-x86_64/egg/QtExt/__init__.py", line 25, in <module>
  File "/home/anthony/Downloads/ftrack-connect-package/common.zip/Qt.py", line 251, in <module>
  File "/home/anthony/Downloads/ftrack-connect-package/common.zip/Qt.py", line 248, in _init
ImportError: No Qt binding were found.

Any thoughts?

[Lorenzo Angeli]

Hi Anthony,
can you please check you have libpng installed ? 
Once installed please try launchihng connect again and let me know.

Cheers.

L.

[AnthonyM]

Yes, libpng-1.5 is installed.

 

Edit: Update: I've installed a fresh Gnome Desktop centos 7.4 on a virtual machine and Connect throws the same error. Libpng is installed on that as well.

[Remus Avram]

Which version of Qt.Py are you running?

Can you check if you have PySide or PyQt4 in the PYTHONPATH?

I would suggest setting a debugger in Qt.Py where the error is raised https://github.com/mottosso/Qt.py/blob/master/Qt.py#L1676 and check what you have in the environment at that moment. Try to run the import manually to check if there is an import error.

 

[AnthonyM]

It's a clean install of CentOS, so I didn't have anything installed in the path. I've installed PyQt4 4.10.1 and PySide 1.2.4 now. Same error. I opened up the Common.zip and Library.zip, imported those Qt.py's and I didn't get any errors. I can import both PySide and PyQt fine.

I'm confused though, shouldn't the connect package 'binary' downloaded from the downloads page work out of the box without dependencies?

[Remus Avram]

Which version of ftrack-connect-package are you testing? I am testing with 0.7.5 and it works for me.

Can you open ftrack -connect-package/common.zip/Qt.py and print the bindings variable? (line 235)

 

[hulmanen]

Hi, I'm experiencing the same issue on a freshly installed Centos 7. I'm trying to launch 0.7.5 from the tarball provided at https://www.ftrack.com/en/portfolio/connect

 

My Qt.py contains the following at line 235 and onwards:

for binding in bindings:
        _log("Trying %s" % binding.__name__[1:], verbose)

        try:
            sys.modules[__name__] = binding()
            return

        except ImportError as e:
            _log(" - ImportError(\"%s\")\n" % e, verbose)

            continue

 

Is this what you wanted to know?

 

Edit: running python from the terminal, I'm able to import everything Qt.py tries to import, except for the QT5 stuff as I don't have QT5 installed.

[AnthonyM]

0.7.5 - I've also tried to run it on two different fresh installed vm's with slightly different presets (install groups, like development) to see if that was it.

It prints:

<function _pyside at 0x7ffb1c179b18>

Edit: Also tested 0.7.4 and no go. So weird that this doesn't work.

[Remus Avram]

can you try to install libpng12 and run again?

[AnthonyM]

Bingo. Libpng12 fixes it. Dang, always forget about libpng vs libpng12. Thanks! Maybe we can get that listed as a dep. somewhere?

[hulmanen]

Libpng12 fixes it for me as well. I second the idea the dependency should be listed in documentation from somewhere. Looking at the installation instructions, it wasn't clear to me that any packages beyond what stock CentOS provides are needed.

[Lorenzo Angeli]

Hi @hulmanen & @AnthonyM this is a good point.
I'll make sure is going to be added somewhere sensible in the docs.

Cheers.

L.
p.s

Cheers @Remus Avram

[AnthonyM]

Thanks @Remus Avram and @lorenzo angeli

 

This post will help me when I do future installs I'm sure