Temse File name -- ACH payments

SAPGurus,

We are getting some error in DME file display (used in ACH payment, US) . Using Transaction code FDTA when we go for display of DME file the TSNAM is displayed incorrect (as we checked from debugging the program).

What is this TSNAM (Temse File name). How is it updated? and which transaction codes are it used in.

Please reply as soon as possible.

Thanks and regards,

Priyajit