To solve this error, you need to edit the trgtd.conf file and change the default_options line to:
For Windows and Linux:
default_options="--laf javax.swing.plaf.metal.MetalLookAndFeel --branding trgtd -J-Xms128m -J-Xmx512m -J-XX:PermSize=128m -J-XX:MaxPermSize=512m -J-Dsun.java2d.noddraw=true -J-client -J-Xverify:none -J-Dorg.netbeans.ProxyClassLoader.level=1000 --fontsize 12"
For Mac:
default_options="--branding trgtd -J-Dapple.laf.useScreenMenuBar=true -J-Xms128m -J-Xmx512m -J-XX:PermSize=128m -J-XX:MaxPermSize=512m -J-Dsun.java2d.noddraw=true -J-client -J-Dorg.netbeans.ProxyClassLoader.level=1000 -J-Xverify:none"
- Windows, normally c:\Program Files\trgtd\etc\trgtd.conf
- On the 64 bit Windows c:\Program Files (x86)\trgtd\
- Mac OSX, go to Applications using the Finder, right click (or command click) ThinkingRock.app and select "Show Package Contents", then it is in "Contents", "Resources", "trgtd", "etc"
- Linux, go to directory where you installed TR and then subdirectories: "trgtd", "etc"