validation

hi experts,

s_rzzps for zupi5a-rzzps_posid obligatory no intervals."wbs element.

This is the field i need to do validation but with conditions

conditions are:

They r 2 types of wbs element one is starting with ' T ' and another is Starting with ' C ' .so when wbs element starts with T just pass the value but when the first letter of it is ' C'

goto table PRPS and check the field USR00. If this field is blank then rise the error message.even when the wbs element is other than this 2 letters we need to pass the error message

please help me i need this urgently.

Thanks & Regards,

Ramya