• createConnection ClassNotFoundExecption error: org.postgresql.Driver*

Note that I have installed the jdbc package, however ROOT cannot use it even though all other users including navwrite can use it. I tested using a java file that uses jdbc.

What this error means is that the PostgreSQL JDBC driver is not available at the time getDeviceData is run. It is supposed to use the 'navcron' user, so either make sure the JDBC driver is somewhere on the classpath or put (or symlink) the jar file in your jre/lib/ext directory.