I tried export SUU (linux 64bit) many times and still failed.
In log file i see an error: "The remote server returned an error: (502) Bad Gateway.: ftp.dell.com/sysman/DRMVersion.cab".
Is there problem with dell repository server in our zone?
Try to download the file from these two locations and let me know if they work:
Daniel MysingerDell EMC, Enterprise EngineerGet support on Twitter @DellCaresPRO