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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.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 57:  Variable type must be pointer
 
The variable in this statement must be of a pointer type.
 
You may be trying to dereference something that is not a
pointer.