Error 'Sequence contains no elements' when opening file for translation

Question

I get the error message 'Sequence contains no elements' when trying to open a file for translation (actually, I get it in Dutch, 'Reeks bevat geen elementen'). The file doesn't open. 
 I already translated about 40% of this file (37,000 words) and losing my work would me make very sad (to say the least). 
 I am using SDL Trados Studio 2019.

Oana Nagy · Answer

Hello Mathilda Wegman , 
 
When posting in community it is always good to get as much information as possible regarding a specific problem- 
The following article explains what sort of information and how to post it in community. 
 
 community.sdl.com/.../4159.how-to-get-help-quickly-in-the-sdl-community-technical-forums 
 
However in the meantime- maybe the following article will help you resolve the problem- 
 gateway.sdl.com/.../communityknowledge

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Error 'Sequence contains no elements' when opening file for translation