An error that may occur in Office Hours when invalid times are being scheduled. If this error is seen outside of Office Hours (in Medisoft), then it is likely caused by data corruption and may need repair by a Medisoft professional. Otherwise, see below:
Ensure Office Hours appointment times match the interval and practice hours set in the Office Hours Program Options.
To fix, first attempt to open up OH and change the time window of the practice to include any and all times, ex 12:05am-11:55pm then attempt to delete the invalid times in the Appointment List (click Lists>Appointment List in Office Hours). Do the same for Office Hours breaks.