Exception In Function Module

Step 1. Create Function Module . Provide Exception.

Step 2. Write Code In Source Code For Exception. Save , Check , Activate   

            & Execute.

Step 3.  keep Value Empty . & Execute.  Click Save.

Step 4. No Data In Export Parameters.

Call This Function In Program

Step 5. Create Program using SE38 .  Write Parameter , Variables . Call   

            Function & Pass Data in it.  Create Message. Write Output .

Step 6. Don't Enter anything in Parameter & Execute it Will Show Message .