MFileIO open

[Anonymous]

On Maya 2017 on macOS -- I have a .ma file which standalone Maya opens just fine, but if I try to open it in my custom exporter I get kFailure from MFileIO::open. How do I troubleshoot this problem? Note, other Maya files work just fine, and this one is super simple (it just has a polyPlane in it) yet it fails.

[cheng_xi_li]

Hi,

I am afraid there is no way to troubleshot it directly. But MFileIO::open actually uses file command to open a file, so I suggest you test with file command.

BTW: It would be better to use force flag with MFileIO::open, because if the scene is not saved, it will fail.

Yours,

Li

[Anonymous]

I am using "force". Plus, after much troubleshooting it turns out that from
FileIO::open I can't even open an empty .ma file, and of course in Maya if
I go File/Open it works fine. Could there be something in the .ma file
format itself that breaks it? Any help greatly appreciated.

[cheng_xi_li]

Hi,

There shouldn't be any problem for .ma file.

If MFileIO couldn't work for you, please try to use MGlobal::executeCommand with file command, it is same as MFileIO.

Yours,

Li

[Anonymous]

Thank you very much for your reply. Can you please post the exact script command I should pass to executeCommand?

[cheng_xi_li]

Hi,

Should be 

file -open "filename.ma" - force;

You can find more details in this document.

Yours,

Li

[Anonymous]

This almost worked, the correct command is:

file -open -force "filename.ma"

Anyway, perhaps this should be filed as a bug, MFileIO::open should work identical to the command.

Thanks!

Emil