Seems to be a known problem:

QTBUG-14825 [bugreports.qt.nokia.com]
http://www.qtcentre.org/archive/index.php/t-25907.html

To Volker:

I think that question is not about

but about last message

To soroush:

Could you share the persian.ts file? I will try it in my environment

persian.ts is an emoty file I simply added to project. I also added below lines to the .pro file. (I’m trying to do what explained in training video)

I get a similar error when a .ts file exists but is empty. It works again when I remove the empty file.

So you could try to remove persian.ts and try again.

I think lrelease should tell proper error instead of this error…

So I’d suggest you to submit a bug about that to Qt’s bug tracker.

OK. Thanks.