CommandLineExec actor does not generate Exit code
Supposedly, the CommandLineExec actor will generate a '1' on the exitCode output when the execution of the command line is successful. Apparently this does NOT happen under Windows; nothing appears on the output if the command does not send anything to SysOut. This makes it impossible to run a command line operation in the middle of workflow and use it to trigger further actors.
See the example $KEPLER/workflows/eco/maxent.xml
Dan Higgins - Jan 2008