[drmaa-wg] Wait Question

What happens when I call drmaa_wait(ANY) and there are no running or completed jobs? The specs don't address this. Obviously an error code gets returned. Which one? DRMAA_ERRNO_NO_RUSAGE? DRMAA_ERRNO_INVALID_JOB? DRMAA_ERRNO_INVALID_ARGUMENT? DRMAA_ERRNO_EXIT_TIMEOUT? I could make a case for each of them. It looks like the SGE implementation returns DRMAA_ERRNO_INVALID_JOB. Daniel