Start the Vault Service
If you have stopped the vault service, you need to turn it back on so that the vault can process new information.
A large vault can take some time before it can be accessed after a system reboot or service restart. The initial startup may take longer than subsequent startups. Even though the SolidWorks Workgroup PDM Server service says it is started, it takes time for the vault data to rebuild into memory. A user cannot log in while the vault is rebuilding.
To start the vault service:
In Windows, click Start, Control Panel, Administrative Tools, Services. Right-click Workgroup PDM Server, and select Start.