Help needed in jcl errors

[vensriram]

Hi I am trying to compile a JCL in my mainframe. I am getting the following errors.
1. DSS4500E - INVALID DATA SET NAME FORMAT IN DSN= OPERAND
2. DSS6140E - EXPECTED CONTINUATION NOT RECEIVED
3. DSS4255E - DDNAME "SYSIN " CANNOT APPEAR BEFORE EXEC

Can anybody of you help me out in fixing these errors

[Joseph Martell]

Can you post your original JCL? I've run into #2 and #3 before. #2 is usually when you added a // where you meant to leave columns 1 & 2 blank or you forgot a "," in your data set definition somewhere. #3 sounds like you are trying to define SYSIN before you actually declare a step in your JCL.