SAP Note 28168 - F4: Matchcode does not find any entry possibilities

Symptom:

For Matchcode F4 Help, neither the popup for selection of the search method (matchcode ID) nor the restriction popup or data are displayed if the F4 Help is not called via the abbreviated dialing. However, the popups and the data do appear if you search via abbreviated dialing (=.).

Cause and prerequisites

A matchcode ID was previously defined with the standard ID, for which no data exists.

Solution
Run the search once using abbreviated dialing =. where this dialing should be saved as the standard ID

Additional key words

Matchcode, F4 Help, default matchcode ID