The camera cooling has not yet stabilized. Click OK in the error window, go to Tools and Status (or click Status button in the toolbar). If you see Too hot or Too cold and a temperature reading in the Status window, the camera is still stabilizing (even if the temperature shows -35 °C). When the warning disappears, the instrument is ready to measure your plate. If the instrument and DISCOVERY WORKBENCH have been running longer than an hour and you see the above error, the cooling control has been lost. Close DISCOVERY WORKBENCH and reboot it in order to restart the camera cooling process. Click the Status button and wait for the Too hot/Too cold warning to disappear. This may take 30 minutes or more. Analyze the plate after cooling is completed.