XFolder requires at least OS/2 Warp 3. It will NOT run on previous versions, for it calls
OS/2 API functions not present on OS/2 version 2.x and before.
I have tested XFolder with the following configurations myself (all German versions):
- OS/2 Warp 3, fixpak 31 installed
- OS/2 Warp 4, no fixpaks installed
- OS/2 Warp 4, fixpak 5 installed
Note: I was reported that installation fails under Warp 3, fixpak 31.
In this case, you should install a newer fixpak.