Why "Save Target As" fails?

Question

When I try to save the target document, it prompts "Failed to save target content: Cannot find file type definitionwith id XML: DITA 1.1 v 1.2.0.0". 
 I reset the user profiile, but it doesn't work.

Paul · Accepted Answer

WANG NING 
 Presumably you received this file through a project package, or an sdlxliff, provided by someone else? Or you created it with one version of Studio and are now working with it on another? 
 One of those will be the most likely reason for your problem because you are working with a version of Studio that is probably newer than the one that created your file since the current version is XML: DITA 1.3 v 2.0.0.0. So you can only translate and return the package or bilingual file, you cannot create the target file.

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Why "Save Target As" fails?