It was working fine, then it stopped working and I got this in the error window (red text on black background):
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space... and so on, but I could not copy and paste from this window.
The cursor was here (^) between n and V, when I hit ctrl-t:
lonValue += rxString.charAt(i); ^
New instances and other sketches work fine. Only this particular code hangs as if there may be something embedded in the code to make ctrl-t hang.
p.s. Is it possible to copy from the error window? If not, then it might be a good idea.