Hi Neethu,
You can actually hardcode the material type in the BS_MAT_OVP_05 configuration parameters if you make a deep copy of standard UI, but for standard UI you can only set material type parameter when you call the application from NWBC or your favourites. Anyway how is it working if you enter the material type ROH in the initial screen where you enter change request type, is the CBA coming up in next screen?
Regards
Goutham