qperr.hlp (Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Error Message
 
Error 90:  Ordinal expression expected
 
A procedure or function expected an ordinal type.
 
A variable passed to this procedure or function must be
of an ordinal type. An expression passed to it must
evaluate to an ordinal value.