I have an assembly and drawing structure like this

ae000001.slddrw,

ae000001.sldasm

   ae000001-001.sldprt

   ae000001-002.sldprt

   ae000001-003.sldprt

When I clear cache and do a "pack and go" on the assembly to attached drawing it will not find it in EPDM. Unless I remove the -001 from the drawing

The drawing/assembly and parts are all in the same folder. Even when I have the assembly open and right click to open drawing, it does not find it.

I'm not sure how deleting the -001 detail correct this. Any ideas? I've tried just about everything.