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out of date.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 131: Invalid real operation
An operation on two real types in this statement resulted
in an invalid floating-point operation. Either an overflow
occurred or an attempt was made to divide by zero.