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out of date.
ISAM - Duplicate value for unique index (ERR: 86)
■ More than one condition can cause this error:
• A unique index is current for an ISAM table, and the user
attempted to enter a value that is already in the column.
• A CREATEINDEX statement has been executed with a nonzero
unique argument value, but the existing column(s) already
contained values that aren't unique.
■ Possible solutions:
• Type a unique value in the column.
• Change the column values to eliminate duplicates and retry
the CREATEINDEX statement.
■ If you need additional help, move the cursor to a keyword
and press F1 to open the Help window.