SICSR-17699

[SICSR-17699] SICS abends when we try to close a worksheet on an OCC.
Product Line:	P&C
Component/s:	Accounting Technical Worksheet
Affects Version/s:	SICS 4.9.3 SSP3
Fix Version/s:	SICS 20.1
**Issue Links: **	duplicates SICSR-15651
Customer:	Unive Herverzeker