From your screenshot , it seems you have two variables
1) Calmonth / Year 2 ) Sales Organization
My guess , in your variant you only saved Calmonth/ year but did not specify Sales Org or other way round . Because this variable in not mandatory, it would work in RSRT or RSCRM_BAPI call but APD needs this value to be populated.
For APD to work, both the values need to be specified.
Regards
Anindya