ktoolbar expects to be able to create $KVEM_HOME/apps and store the user's projects there. Obviously neither is possible under the current configuration, with KVEM_HOME currently pointing to /opt/sun-j2me-bin-2.2/ or similar. However, it also expects certain things to already be in $KVEM_HOME, like wtklib/Linux/ktools.properties . I don't see a good fix right now.
Creating e.g. $HOME/j2mewtk/2.2/ and making symlinks to the directories in /opt/sun/j2me-bin/2.2/ appears to work correctly.
Erk! After modifying /opt/sun/j2me-bin/2.2/bin/ktoolbar to set KVEM_HOME to $HOME/j2mewtk/2.2/ that works.
sun-j2me-bin has been removed from the tree.