One and a half hours. FLI Centerline wheel. Using filter 13 in MaxIm/FLI with from filter 9. ACP sees the list of filters from MaxIm as having 10 filters and can successfully select the 10th filter (number 9). However later, the wheel reports that same filter as having number 13 and when ACP goes to log the filter used by name it tries to translate the 13 coming from the wheel and there is no translation. Inconsistency in the filter numbers due to a bug in the very old 2008 FLI plugin for MaxIm. I learned yesterday that the newer FLI ASCOM filter wheel driver is the one to use. Although it appears that an ASCOM filter wheel driver is installed it did not see the filter wheel. We don't know if that is the latest ASCOM filter wheel driver and we could not find one listed in the FLI web site. Then the filter wheel disappeared from the COM port list and even the old driver couldn't see it. He cannot (yet) power cycle the filter wheel. At this point we are stuck until the Sierra Remote Techs can restart the filter wheel.