Possible causes:
· The .mdb file has invalid header information or an unknown sort order.
· A commit is pending from another user, but the lock file cannot be found.
· The database is damaged. Repair and compact the database, and then try opening it again.
Damaged databases are usually caused by power outages or network problems. To repair damaged databases run the "RTO Pro Compress and Repair Data" program. But first ALWAYS DO A BACKUP.
First Make sure that RTO Pro is NOT running on this computer or on any others if you are on a network.
If errors are encountered during the repair process call technical support at 800-351-6299.