Debugging FOX formulas is a critical skill for resolving errors within SAP BW Integrated Planning (IP) and HANA-based BPC models. The process requires a systematic approach starting in transaction SE24 using the SAP standard class CL_RSPL_NR_CONTROLLER. By navigating to the "execute_service" method and setting a breakpoint at the "get_timestamp_field" call—typically located around line 112—users can intercept the planning function execution. Once the breakpoint is active, the formula must be triggered via transaction RSPLAN. Within the resulting ABAP debugger, the "Script" tab facilitates the loading of the specific SAP-defined tool, RSPLFC_DEBUGGING_SCRIPT_FOX. Executing this script transfers the session directly into the FOX formula environment, allowing for granular analysis of the logic and data values during runtime.
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