I had a problem today where soapui 4.0.1 was crashing right after startup on my Linux box. This crash happened whether I used OpenJDK or Sun JREs and I was stumped until I found some great advice.
Essentially you need to edit soapui’s start script:
Have a look at line ~122/123 in the script for the bit that says:
#uncomment to disable browser component JAVA_OPTS="$JAVA_OPTS -Dsoapui.jxbrowser.disable=true
All you have to do is remove the # from the front of the line starting with JAVA_OPTS so it looks like the above. After that just save the file and launch it again. Fixed.