paexec is not working from non domain machine to domain machine

I am using paexec for remote machine command execution. and we have been observed that paexec is not working for scenario like from non domain machine to domain machine. psexec is working fine for this scenario. and using paexec i can able to execute command from domain machine to non domain machine.

While executing command from non domain machine to domain machine, getting below error regarding not able to copy the file:

Failed to copy [C:Windowssystem32paexec.exe] to [\10.94.217.63ADMIN$PAExec-2464-WIN-A6SPVQHOA9V.exe] -- going to try to continue anyway. The system cannot find the file specified. [Err=0x2, 2] Starting PAExec service on 10.94.217.63... Failed to start service on 10.94.217.63 The system cannot find the file specified. [Err=0x2, 2] Failed to stop PAExec service. The service has not been started. [Err=0x426, 1062]

PAExec returning exit code -6

any help on this would be very helpful.

Thanks,

Kumesh