Nö, kenn ich nicht.
und die senior Entwickler der Kunden haben auch keine Idee,

vielleicht treat

--> CONTENTS Table of Contents for RPG/400 Reference

1.1.4.1 How the Compiler Recognizes a Compiler /COPY

The treatment of a /COPY directive as a compiler copy or auto report copy depends on which create CL command is used, either CRTRPGPGM or CRTRPTPGM. Use the rules for RPG/400 symbolic names, to specify the library files and member.

1. The CRTRPGPGM command will treat any /COPY directive encountered in the source code as a compiler copy and does not accept the sorting or string replacement functions.

2. The use of CRTRPTPGM will treat any /COPY directive encountered as an auto report copy and will process any sorting or string replacement.
Gruß
Robi