Hi Pushkar,
Please check individual/collective indicator in the material master is set to 1 so that all material will get planned in MD51 other wise you need to run MD02 to plan the dependent materials.
Please check WBS element is assign to your planned order there is no need to use Read PP master data.
Also check any exception message there in MD04.
Please refer the below link,
Regards,
R.Brahmankar