Example for Local Field Exits

Requirements

• Create a field Exit for Data Element 'MATNR'  ( Material Number )which will restrict users from entering a Material Number 'DUST201' only at 'MM01' Transaction Code.

Steps:-

To find out the Program name and Screen Number : -

• Go to Transaction Code MM01.

• Click on System -> Status.

• Pop-up will appear.
• Copy the program name as well as Screen Number.

To find out the Data Element name.

• Click on Material Input box and Click on F1 ( Documentation Help ).

• Pop-up will appear.
• Click on Technical Information.

• Pop-up will appear.
• Copy the Data Element name.

• Go to Transaction Code CMOD.

• Enter the Transaction Code PRFB.

• Create Global Field Exit first.

• Select the Data Element i.e MATNR and Click on " Assign Prog / Screen ".

• Pop-up will appear.
• Enter the Fld.Exit i.e A-Z , 0 - 9 .
• Enter the program name and Screen Number.
• Click on SAVE.

• Automatically generates a Function Module.

• Click on Create Button.
• Pop-up will appear.

• Enter the Function Group name and short text.
• Click on Save.

• Click on Source Code Tab.

• Enter the Logic.

• Save -> Check -> Activate.
• Click on Back.

• Click on Back button.
• Pop-up will appear.
• Click on Continue.

• Check the Status.

Test

• Go to transaction code MM01.

• Enter the material Number as DUST201 and required field entries.
• Press Enter.

• Check the Status bar.

Note : 

1. For a Data Element we can create either Global Field Exit or Local  Field Exit. At a time any one will be in active state.
2. For a Data Element we can create 36 Local Field Exits i.e 0-9 = 10 , A-Z = 26 , Total = 36.