We tried to implement the loading of flat file through BEx using the "How to Load a Flat File in SAP BI Integrated Planning Using BEx" but we are experiencing some problems.
Instead of changing the standard class ZRSPL_FILE_UPLOAD, I created a new one ZZRSPL_FILE_UPLOAD, deleted the code beneath IF_RSPLFA_SRVTYPE_IMP_EXEC~EXECUTE method and placed your code.
After that I created a new function type and associated the class previously created.
Made everything in planning modeller and created a button to call my planning sequence.
The problem is that Iu2019m not able to choose the file to upload. I guess this happens because I have one parameter in function type called FILENAME.
The system keeps asking for the predefined file, defined in planning functions tab.
Do you have any clue for this?