A File I/O error occurred while Accessing.

[devunix]

Hello,

I am trying to migrate my Virtual machine from Esx 4.1 to Esx 5.5. This is completely on new vCenter. However, when i trying to migrate using VM Ware vCenter Converter Standalone, i am getting error "A File I/O error occurred while Accessing." This error shows when i click "finish" on the summary. Attached the diagnose file. Any expert, please advise.

[POCEH]

Your error is:

2016-01-28T15:34:05.312+08:00 info vmware-converter-worker[06304] [Originator@6876 sub=Default] GetManagedDiskName: Get disklib file name as vpxa-nfcssl://[VADSCES9XENDS] vadsacs03.ASTRO.AMDOCS.ASTRO/vadsacs03.ASTRO.AMDOCS.ASTRO.vmdk@vadcesesxnpxa01:902!52 68 22 3d 8e 31 be 28-96 3b ae f7 69 00 68 e4

2016-01-28T15:34:12.593+08:00 warning vmware-converter-worker[06304] [Originator@6876 sub=Default] [,0] [NFC ERROR] NfcNewAuthdConnectionEx: Failed to connect to peer. Error: Host address lookup for server vadcesesxnpxa01 failed: No such host is known

The host is not visible from the source computer.