I have two arduino plugged in via separate com ports.

My processing sketch works fine as long as the arduinos are online...

If I forget to plug one in or I don't give the pro micro time to boot up then my processing sketch runs but will not receive data input and I need to manually shut it down and start over again...

Is there a workaround??

I am just reading a serial data stream from each arduino (no arduino library)..  The processing sketch will generate exceptions when something in the com port is wrong but when I run the compiled exe file it just works fine but won't process the serial data.