Hello, I'm receiving a similar error as the OP.
I have a 2D vision process that works most of the time, but occasionally get a vision failed error. Upon reading the Vision Log, it says the Status of the Get_Offset instruction was "CVIS-151 No more vision offsets". There aren't any stored image captures of failed scans, suggested that this is not caused by a failure to recognize the part.
When observing the Runtime screen during a vision failure event, the part is framed by a Red rectangle, yet the RUN_FIND event is labeled as a success. See attached image.
Any ideas?