Message SAP WS463 - An internal error occurred

Diagnosis
An internal error occurred.

System Response
The function is terminated.

Procedure
INCLUDE ISR_VERWALTUNG

Procedure for System Administration
Please contact SAP.
There are no entries in Customizing table TMFK1 for price change groupV1. the error occurred in function module "wlf_prchgrp_read_cust".