Hi Sapbasis,
Please check in your SCM system is connected to business group,
SPRO->Integration via APO CIF->Basic settings->Maintain BSGs.
Also SCM IMG>Integration with SAP components>Integration via APO core interface>Basic settings>Assign logical system and queue type.
To enable the transfer of data between SAP R/3 and SAP APO, you need to name both the SAP APO system in which you are working and the SAP R/3 system to which you want to transfer data as logical systems.
Regards,
R.Brahmnkar