Files included in installation:
I guess I should have stated that I've read and re-read page 146-147 of the documentation. (What DynaZIP files do I need to ship with my OCX application?) I have added DZOCX32.OCX, DUZOCX32.OCX, DZSTAT32.OCX and OC30.DLL as self-registering and have added all the other files they list to be copied to the Windows System folder. (including DZIP32.EXE, DUNZIP32.DLL and DZPROG32.EXE)

Error received when:
Well, I had registered the OCX's with DynaZIP's shortcut on the development machine, so they were already installed. Problem is arising only on a machine that does not already have DynaZIP installed. (Run-Time-- on another machine is the problem )