Solution : https://service.sap.com/sap/support/notes/1163770 (SAP Service marketplace login required)
Key words : 
program error solution, primary output, stage formula, 'conversion factor, piece' characteristic, terms cl_frml_calc_spc_io, check_property_changed reason, support package, correction instruction, totransfer
Related Notes : 
       
| 1167498 | RMGMT210: Corrections in Support Package 13 |