Make/Find Appt button doesn't always work

[atd]

This has only happened 3 times in the last week, so it may be hard to track down why/when this happens - but I thought I'd see if anyone else is noticing this problem. When clicking the Make/Find appt button the window won't open - no error message, just nothing happens. I've tried re-selecting the patient, going to a different patient, changing modules and going back to the appointment module, etc. The only thing that works is closing Open Dental and reopening it. Anyone else?

[atd]

I'm on version 6.7.19

[jordansparks]

That's odd. Have you tried holding down the Alt key, and then tabbing between applications. When you get back around to OD, let go of the Alt key. Sometimes, this brings a hidden window to the front.