How to debug "&alias not found" problems

 

Where '&alias' is any file name in the H2OS system.

 

Generally, if H2OS cannot find  a file it needs, it will put up a message on the screen with either the name of the file or it's H2OS assigned "alias" name.

 

In either case, this name is the clue to sorting out the problem, so please be sure to either capture your screen with this message on it, or note the name displayed.