Field Exit or User Exit for Maintenance Order field.

Question

Dear All,
we need an field exit or an user exit for order(AUFNR)field in PM module.
The Client wants that the value of this field should be validated and for certaion condition an error message should be given while saving an invoice for this order.
Kindly provide the user exit ..
Its urgent.
Thansk in advance ..
regards
Ajay.

Answer 1

Implement Field Exit within program   
For this example I am using dta element 'EBELN' from table EKKO.                   
Step 1: Execute program 'RSMODPRF', entering the data element of the field
Step 2:Create function module when prompted, and add you code to the source section using the parameter 'INPUT' as the field value you are checking
Step 3:      Save and activate Function and execute transaction 'CMOD'.
Step 4:      Choose option: Goto-> Text Enhancements->Data elements->New DE cust docu.
Step 3:      Save and activate Function and execute transaction 'CMOD'.
Step 4:      Choose option: Goto-> Text Enhancements->Data elements->New DE cust docu.
Step 5:      Enter data element
Step 6:      Save and activate
Step 7: Execute program 'RSMODPRF' again but this time leave data element field blank. Step 8: Select the checkbox for the data element you have just created and choose option: Field exit->Activate This will now be active for all instances of this data element, but you can assign specific program and screen combinations by pressing the 'Assign prog./screen' button. You can also change the code you entered in the field exit function module by pressing the 'Edit FM' button.
regards
vinod