/SAPAPO/PPT1 "No product/location combination available for line entered"

Hi experts,

I am getting following message ("No product/location combination available for line entered"), if i want to enter Product Planning Table (/SAPAPO/PPT1) with a production Line.

The Production Line (L_VEHIS_AS) is created by IPPE (Integrated Product and Process Planning) and i am working on a S4HANA System.

Can you please let me know what is missing in my above statement?

Thanks in advance for your help.