017-10-25 04:15:35 avtar Error <10542>: Data Domain server "cindd2001.us.chp.accenture.com" open failed DDR result code: 5037, desc: illegal operation (Log #1)
2017-10-25 04:15:35 avtar Error <10509>: Problem logging into the DDR server:'', only GSAN communication was enabled. (Log #1)
2017-10-25 04:15:35 avtar FATAL <17964>: Backup is incomplete because file "/ddr_files.xml" is missing (Log #1)
2017-10-25 04:15:35 avtar FATAL <8941>: Fatal server connection problem, aborting initialization. Verify correct server address and login credentials. (Log #

DD is pingable

But still backup is failing.Can someone please help me on this.