PPM removed by CIF

Hi Guys,

Multiple PPMs are available in the system , When the firm planned order created in /sapapo/rrp3 period tab for the PPM3 after sending the planned orders to ECC, the PPM got removed from the planned orders.

All PPM have validity period from 01/01/2013 to 30/12/2039 and lot size of 0 to 9999999.

There is no user exit to modify the source of supply, any idea what will cause this change.

You help very much appreciated.

BR

Thamizh