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out of date.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 67: Invalid label
The label is incorrectly defined.
A label is a digit sequence whose value ranges from 0 to
9999. Leading zeros are not significant.