Thank you for your suggestions.

I have tried to use the SQL LCOK in the following way after I found a reference that said
LOCK TABLES table_name WRITE will provide a lock but let me write records
to the table. 
    $lock_res = 'unset';

    $lock_str = "LOCK TABLES " . $table . " WRITE";

    $lock_res = $dbh->do($lock_str);

    print "[lock_table] locking table <$table> result <$lock_res>\n";

[download]
However, this does not seem to have worked since
1. $lock_res did not contain anything after the code;
2. I could use Access normally to alter data in the table.
What am I doing wrong?

In reply to Re^2: Locking Access Records and Database by merrymonk
in thread Locking Access Records and Database by merrymonk

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