I tried placing the print object at different parts of the patch and took some screen shots. I placed the [sel 32] right after the serial data comes in to try to filter out the spaces.
The first two screenshots are before the [iter] and after. This object doesn’t seem to make much of a difference. Adding the [sel 32] at the start has added the error checksum message, this used to be an occasional "packet to long" error message, know it is quite regular "checksum error".
Screenshot 3 is further down the max window with the print object in the same location.
Screenshot 4 is with print placed after the [zl group] object.
I also placed the print object after the [route 27], and no data seems to be output from this object, i.e the max window did not print anything.
I wasn’t to sure where about you where meaning to place the [regexp] and [from symbol] withing the signal flow?