SAP Note 19355 - Screen Painter: Termination during test

Symptom:

The "Test" function is selected in Screen Painter.
A termination occurs with the ABAP/4 runtime error DSTEP_NO_MODULE.
() EUNOTE, EUSCREENPAINTER

Cause and prerequisites

The flow logic of the test screen received a MODULE statement for a module that is not defined in the moule pool.

Solution
The function "Check -> Consistency" will find the MODULE statements that are not defined in the module pool. Please correct the inconsistency in the flow logic and then select the "Test" function again.
In most cases, a termination can only occur when the incorrect MODULE statement appears in one of the two sections PROCESS ON HELP-REQUEST or PROCESS ON VALUE-REQUEST; modules in the sections PROCESS BEFORE OUTPUT and PROCESS AFTER INPUT are usually skipped during the test.
The exception to this is the testing of a screen that is the initial screen of a transaction, and for which the user expressly defined that full flow logic should be tested in the test area popup.