Print a helpful error message for a hard-to-debug situation.  #6371
Print a helpful error message for a hard-to-debug situation.  #6371

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor