qbasic.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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Variable required
QBasic may have encountered an INPUT, LET, READ, or SHARED
statement without a variable argument. QBasic may also have
encountered a GET or PUT statement which didn't specify a
variable when an operation was performed on a file opened
in binary mode.
 
ERR code: 40