It would be more helpful to see the underling error message and not just the title, however, perhaps the best solution is to recreate the project, pre-translate from the TM (or use Perfect Match if you have Professional) and then save the file.  It sounds as though something was corrupted and this is often the easiest approach.

Paul, Thank you for your quick response.

Quote to see the underling error message and not just the title unquote:

Right now I am running Trados with Japanese UI and I would send the error message in English if I fail the following process:

Quote best solution is to recreate the project, pre-translate from the TM (or use Perfect Match if you have Professional) and then save the file unquote:

I took the same approach hoping for the successful creation of translated file. I will re-try after fully checking the translations in TM. This error is not shown during the translation process and verification before creating the translated file is OK. But [Create Translated file] process in terminated with the error in question.

Anyway, I will be back again.
Again thanks for the quick support.

This issue has been resolved in accordance with your suggestion, which recreates to the project.
Thank you for your support