msg when no whycon marker is detect

[sonu628]

When no marker or less than target number of marker is/are detected , the callback function is'nt called and hence program is stops till it detects whycon . If there is way to send msg when this happens ? .
If yes which file or line or function does the flow goes when this happens ? .

[dil2743]

I am facing the same problem, I am unable to detect the absence of the marker. If there is a way to do so please let me know.

thank you