SAP Message AJ602 - Internal error: CSNO &1 not found in table &2

Diagnosis
An internal error has occurred.
An unexpected error has occurred within the billing in the quantityconversion (function module &V3&):
No suitable entry was found in internal table &V2& for the schema step(CSNO = &V1&).

Procedure
INCLUDE ISU_SAP OBJECT DOKU ID TX