SAP Message WB2B203 - No suitable data found for the NAST object key (internal error)

Diagnosis
An internal error occurred in function module &V1&. The systemattempted to determine a follow-on document of category
CASE &V2&.
WHEN '1'.Trading Contract
WHEN '2'.Sales Order
WHEN '3'.Purchase Order
WHEN '4'.Vendor Billing document
ENDCASE.However, no entry was found.
The error message was triggered during processing of a NAST record withthe object key &V3&.

System Response
INCLUDE ISR_STOP

Procedure
INCLUDE ISR_VERWALTUNG