SAP Note 15569 - Double-click on message number

Symptom:

Call transaction SE38 and change a program. Double-click on a message number leads to a dialog box where you have to enter the message class although the message class is defined for the program. () EUNOTE message

Cause and prerequisites

The index of the corresponding program is not current.

Solution
You must use the "Update index" function in the "Utilities" menu to update the index of the program.