VMware backup error, "file read failed(13)"

Dear all,

I am using NetBackup 7.5.0.4 on Windows Server 2008 R2.

I created a VMware backup policy using VIP to query some VMs.

When the job run, 2 VMs is successful but 1 VM failed with error "file read failed(13)"

inside bpfis log, i found this error : Unable to access file <unspecified filename> since it is locked <182>

kindly advise if someone has a solution.

Best regards,

Windsor