Hi, Raman!
Of course, first of all i checked TMS log 
- that's howi understood that request was cancelled with code 12. The log just refers to st22, but in st22 i dont see any technical name of TRFN or DTPA.
I guess our basis team should implement 1980308 - P33; DTP; TRFN: Message_Type_X when importing a data transfer process (DTP)