Transport control program tp ended with error code 0247

Hi Experts,

I am trying to import a transport request from STMS -> Import Overview -> Import Queue -> Display -> Extras -> other requests -> Add.

But, I am getting the error "Transport control program tp ended with error code 0247. Errors: addtobufferhas problems with data- and/or cofile".

Any ideas, please?

Thanks & best regards,

Sinu