I have faced the same problem and solved in simple manner///
thought of updating this thread which will help others
in PBO, PAI of sub-screens please add the below code.
pbo.
**inserted new**
module modify_subscreen.(this will be called in standard program mppersoo).
*End of new insertion**
pai.
**inserted new**
chain.
module input_status_subscreen on chain-request.
endchain.
**end of new insertion**
Just add above 2 module statements this will be fixed.
