These warnings appears while creating an existing workdirectory

WARNING: missing resource: wdc.existsNotWorkDir_convert.txt for com.sun.javatest.exec.i18n
WARNING: missing resource: wdc.existsNotWorkDir_convert.title for com.sun.javatest.exec.i18n
WARNING: missing resource: wdc.existsNotWorkDir_convert.txt for com.sun.javatest.exec.i18n
WARNING: missing resource: wdc.existsNotWorkDir_convert.title for com.sun.javatest.exec.i18n
Original description inaccurate/incomplete. This occurs if you attempt to create a workdir using a path which already exists.

For example, mkdir dummydir, then try to create that directory when doing create workdir in GUI.