Hi,
without that hint, I won't have dared to delete the module this way. It worked perfectly!! Our main problem was, that module Z_EW_PROCORDCONF_CREATE_HDR had no parameters at all referencing on structures. Thus, the generation of Z_EW_PROCORDCONF_CREATE_HDX dumped in any case, because parameters without structure reference are hidden automatically for the resulting ALV (no_out). As a result there would be no structures at all to display -> DUMP.
One has to know, that those function modules have to have at least one "structure" parameter to work.
Thanks for your help
Volker