My health kit in Creatures 1 won't open... all the other kits do, except for that when. When I click on it, it says: "Error message unavailable." Any ideas on what to do?
Other than that the game works FINE! Same with creatures 2...

There is a similar topic about the issue with the C1 Health Kit. It basically has to do with running Creatures 1 in Administrator Mode.

Hopefully this helps and resolves the issue! Enjoy playing!

if that solution doesn't work as it didnt with mine then do the following: change the filename of "Health Kit.exe" to "HealthKit.exe"
then go and find the file name Applets in the same directory (the c1 default directory where also the health kit file is)
Open it with notepad(++) or any other simple texteditor, change in it the word Health Kit to just one word HealthKit, save and close.
Now launch c1 and your healthkit is again working in full glory!