Upon opening Document Manager, if the following error occurs 'List index out of bounds (-1)' and the client folders are missing, a rebuild is recommended. Where possible and to avoid downtime, consider running the rebuild directly on the server after hours as users are required to exit all HandiSoft programs during this process.
For more information on the rebuild process please review How do I rebuild database files in HandiSoft and HandiSoft Online Programs?
Note: Before running the rebuild ensure you have a recent working backup. Rebuilds are not available in the SQL version.