Check that sourceURL and destURL are both URLs and not file name strings. Print error if not.
Check that sourceURL and destURL are both URLs and not file name strings.
Print error if not.

gridcf/gct,globus/globus-toolkit,ellert/globus-toolkit,ellert/globus-toolkit,globus/globus-toolkit,globus/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,ellert/globus-toolkit,globus/globus-toolkit,gridcf/gct,gridcf/gct,globus/globus-toolkit,ellert/globus-toolkit,globus/globus-toolkit,gridcf/gct,gridcf/gct,ellert/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,ellert/globus-toolkit,gridcf/gct