bas7ener.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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Type not valid for ISAM
The OPEN statement in ISAM uses a user-defined type as the
table-type under the following rules:
   ■ The names of the fields must be less than or equal to
     30 characters long.
   ■ You cannot have an element of type SINGLE.