Error “Object reference not set to an instance of an object” when trying to generate a target translation

Hello,

 

I have been getting an error message (Object reference not set to an instance of an object) when trying to generate a target translation in Studio 2015 SR3 several times this month.

This error happens to some packages provided by a certain client, but never happen to those provided by other clients. I also tried to extract the source file (excel file) from one of the packages by using “Save Source As” option in “Advanced Save,” but I got the same error message.

I reported this error to my client but they could not solve the problem. I am not sure if this error is caused by my software or the packages provided by the client.

 

I wonder if anyone can help me with this matter.

 

Thank you so much for your help.