VDDK 1.2.1 write failed with unknown error return code 1

Hi,

I am facing this unknown error with return code 1 many time during the write operation (both advance tranport mode and NBD mode).

VDDK detailed log error information are as below

[NFC ERROR] NfcNetTcpRead: bRead: -1

DISKLIB-LIB   : RWv failed ioId: #10900 (290) (34) .

some times we get some different IO VDDK error information for the same unknown error message, RC = 1

On behalf of the above write failure, i have following questions.

1. What are the possible reasons for the VDDK failure with unknown error message and return code 1, especially during write operation?

2. Is there any way to resolve it or continue the write operation. If yes please explain the operations we need to do (like, we need to start again from VixDiskLib_InitEx() or VixDiskLib_ConnectEx() or OpenVMDKFileA())

Please let me know if you need any more information

Thanks in Advance,

Muthu