Record R/DPSC//ZMR1/0022 not found in table TE305

Dear exports,

while i am creating the sub transaction in ek02 i am getting an error of " Record R/DPSC//ZMR1/0022   not found in table TE305". i have created the sub transcation in SPRO-CA AR &AP-POSTINGS AND DOCUMENTS-DOCUMENT-MAINTAIN SUB-TRANSACTION.

please guide me...

thanks in advance

Regards,

Srinivas