3535670 - Error in Custom Calculation within Process Chain Decision Step

• After the creation of a new custom calculation, an attempt to run the calculation within a decision step of a process chain results in the error 'RSPC110 - Error in calculation X'.
• The job BI_PROCESS_DECISION failed with the below logs:

         Start process DECISION X in run Y of chain Z
         Variant X, instance T started in chain run Y
         Calculate condition XX
         Error in calculation XX
         Process Decision Between Multiple Alternatives, variant X test version for SAP message has status Ended with err

• SAP NETWEAVER all versions
• SAP BW 7.5 all versions

Process Chain, Custom Calculation, Decision Step, Error, RSPC110, Calculation, Class, BAdI, Interface, BI_PROCESS_DECISION, formula, Decision, Error in calculation, class. , KBA , BC-SRV-BR , BRFplus - ABAP based Rule Framework , BW-WHM-DST-PC , Process Chains , BC-SRV-BRF , Business Rule Framework (For BRF+, use BC-SRV-BR) , Problem