How To Fix WS408 - An internal error occurred

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 408

• Message text: An internal error occurred

What causes this issue?

An internal error occurred during reading of configuration data.

System Response

The function was terminated.

How to fix this error?

INCLUDE ISR_VERWALTUNG

Procedure for System Administrators

Check the entries in Customizing table TMFK. Contact SAP if necessary.
The error occurred in sub-program TMFK_select_check in in function
group wlf_invoice_test_docs. Structures ts_tmfk and ts_lfart are both
empty.

Error message extract from SAP system. Copyright SAP SE.