You need to create a long text whenever a message short text is not enough.
You have already created a short text for the message. You must not have documented the short text message as self-explanatory.
For transportable message classes, you must save active the long text by choosing .
When a message with a long text is triggered, the system indicates this by a yellow question mark. Depending on the SAPGUI settings, this is displayed:
In the status bar
In a message dialog box.
When you click the status bar or Help pushbutton, the system displays the long text.