#127 subprojects are included via absolute paths

[big_brainbug]

Sharing a rmp-file containing one or more subprojects to another system via some content management software like Subversion is only possible under very hard limitations! Because include paths to subprojects are stored absolute, each system where the rmp-file shall be used must have the same drive and directory path under Windows OS. Otherwise the subprojects cannot be loaded by the application.