This error happens when the Timesheets program is left open without any activity on the computer or session for 20 minutes or longer. It can also occur if the connection between the timesheet and the database server times out because the Timesheet module was left open while the main Practice Management module was closed first.
Suggestions to fix this error
Log off from APS.
If the issue persists, the next step is to log off from the workstation and log back in. However, if you are using Citrix, or a terminal server, or workspace environments to access APS, request your IT to sign you out of your session.