Error in deploying a sysprepped Windows 10 x64 Image using DS 7.6

I created my own preboot environment which uses Win PXE 5.x to boot into x64 bit version.

Then I ran Deploy image task and gave the location of my ghost image which failed with thsi exception.

ErrorMessage: Exception has occured in File Tcube_ClientImageDeploy.cpp at Line No 1243. Type of exception is ClientImageDeployException. Error Description is Child Process returned an error. The exit code from process is 3. Value of Windows error code = 6 and message is The handle is invalid.

Also where can I find the log files of this task.

Please help me debug this issue.

Thanks