I like to duplicate some pickups from the PICKUPS-package to my own package, to assign these to my own material-file(s).

The problem is that the duplicated mesh will disappear when i assign my own material-file to this mesh. (example: PICKUPS.Health_Medium)

Other packages works fine, it's only the PICKUPS-package having these "problems"as far as i know.

Anyone knows how to fix this?