Hi,
my requirement is also same.
1. please tell how to fill data with custom fields in idoc segments using EXTENSION1 on ECC side.
2. i am using EXIT_SAPLV50K_007 user exit in ecc.
3. please help how you solved to transfer data from ECC to EWM.
please answer these how to use user EXIT_SAPLV50K_007 to idoc
please answer .