I use ADIsimPLL to set charge pump filter components and to get register values for programming ADF4360-7. Sometimes the Chip Programming Assistant shows a text in red 'Freq < Fmin' close to the output frequency field (see attached png). When changing counter values to increase frequency the text changes immediately to 'Freq > Fmax'. Apparently the Assistant flags some kind of error, but it is not clear what as the frequency appears to be within the component's specs.
What does this error mean and how do I resolve the cause of it?
This question must arise rather often but I find nothing about it searching the Engineerzone.