Missing field layout template of component variable is causing compile error

Summary:
Uniface: When compiling a component with Uniface 9.7.02 (Service Pack MG01)
that has a component variable with a non-existing field layout template then
this will fail (in Phase 7 - Procs compilation) with the error:

error: Text for message 1020 not available

Symptoms:
When compiling a component with Uniface 9.7.02 (Service Pack MG01) that has a
component variable with a non-existing field layout template then this will
fail (in Phase 7 - Procs compilation) with the error:

error: Text for message 1020 not available

This cryptic error message is thrown, since the required message 1020 is not
defined. The correct error message should say:

"1020 - Layout template %%$sub%%% for component variable %%$sub(1)%%% not
found."

E.g.

"error: 1020 - Layout template @LAYOUT1 for component variable $COMPVAR1$ not
found."

When the same component is compiled with a version < 9.7.02 then no error or
warning is generated in the described scenario.