Suppose you want to add some additional jars to your SoapUI installation. It all should work ok if you put them in bin/ext directory. It is scanned at startup, and jars found there are automatically added to classpath.
However if you want to add some JDBC drivers, and happen to be using SoapUI version higher than 3.5.1 it is a bit more tricky.
You may face this NoClassDefFoundError:
An error occured [oracle/jdbc/Driver], see error log for details java.lang.NoClassDefFoundError: oracle/jdbc/Driver
If so, try registering your drivers with registerJdbcDriver function, like I did in this snippet of code:
What a crappy thing!