Stored Procedure issue

Question

I have this stored procedure to check if someone ordered a Cancellation date on the line before cancelling it but when i try to add another condition where it should also check for cancellation code it fails. It works if they are individually used. Any suggestions.
Original Code
If (@Object_Type='17' and @Transaction_Type='U')
Begin
If exists (Select T1.LineNum from RDR1 T1 INNER JOIN ORDR T0 ON T0.DocENtry = T1.DocEntry where T1.linestatus='c' and T1.U_Cancellation IS NULL  and T0.DocEntry= @list_of_cols_val_tab_del)
Begin
set @Error='909'
Set @error_message='You cannot close an Order without a Cancellation Date'
End
End
Changed code
If (@Object_Type='17' and @Transaction_Type='U')
Begin
If exists (Select T1.LineNum from RDR1 T1 INNER JOIN ORDR T0 ON T0.DocENtry = T1.DocEntry where T1.linestatus='c' and T1.U_Cancellation IS NULL  and t1.u_pocancellationcode='01' and T0.DocEntry= @list_of_cols_val_tab_del)
Begin
set @Error='909'
Set @error_message='You cannot close an Order without a Cancellation Date'
End
End

Answer 1

Just try this query :
If (@Object_Type='17' and @Transaction_Type='U')
Begin
If exists (Select T1.LineNum from RDR1 T1 INNER JOIN ORDR T0 ON T0.DocENtry = T1.DocEntry where T1.linestatus='c' and T1.U_Cancellation IS NULL and ISNULL(t1.u_pocancellationcode,'') ='01' and T0.DocEntry= @list_of_cols_val_tab_del)
Begin
set @Error='909'
Set @error_message='You cannot close an Order without a Cancellation Date'
End
End
Hope this help.
Regards,
WhiteWood