Description from the package:
"This REXX extension DLL allows one to toggle the hard error state of OS/2.
By disabling hard errors, one can avoid interruptions by OS/2 when a hardware device is in a not ready state, and other hard error pop-ups.
For example, if you attempt to change to the root directory of a CD drive that has a music CD in it, or no CD at all, OS/2 normally pops up a box saying that the drive isn't ready, and offers you a chance to retry, return an error code, or end the current program. This can be annoying, and it can also be fatal for automated tasks.
With hard errors disabled, this pop-up will not occur, and the directory() function will merely return a null string, indicating failure. The same is true with invalid drives."