Processing

#Troubleshooting

I had a lot of problems getting Processing to successfully communicate over Serial.

First I had a version mismatch which gave me this error:

WARNING:  RXTX Version mismatch
        Jar version = RXTX-2.2pre1
        native lib Version = RXTX-2.2pre2

I found the solution [https://groups.google.com/forum/?fromgroups#!topic/makerbot/fPI_saNgsbM|here] which required installing the new version of RXTX for Java. After that was installed, I got a cryptic PortInUseException on my Mac when running the sketch. I found the solution [http://jgrasstechtips.blogspot.com/2008/04/rxtx-and-funky-portinuseexcep...|here]; I needed to add a folder "/var/lock/" which did not exist on my machine and then change the file permissions for that folder. After opening Terminal, this is what I typed to fix the problem:

cd /var
sudo mkdir lock
[enter your password]
sudo chmod 777 lock
[enter your password if prompted]