Originally posted by Westside guy
This is probably a "stuffit expander" error. Not everything inside of the installer has been correctly marked as executable (I ran into this exact error installing Palm desktop on 10.2.8).
Thanks. It turns out the permissions were probably correct, (I finally did a chmod 777 just to be sure), but your hint got me thinking that I did have it running on Panther at one time.
So here's what finally fixed it for me (while now cursing how badly designed an app palm desktop is; it leaves a mess of files everywhere):
In Finder, I did a search for "palm".
I took all the palm related files in system folders and trashed them (this was cursing part; it turns out the files were in more than just Applications/Palm, Library/Palm et al).
Tried the installer again, and this time it worked.
Now I can go about re-enabling the iSync integration.
So far all thePanther users who cannot get Palm Dekstop 4.1 working, scour your entire hard-drive for palm files. That would appear to be the problem.
Thanks again, the hint didn't work, but it sure got me moving in the right direction!