Customize virtual machine failed. How to find the reason?

Hi All,

I am creating virtual machine from a Windows VM template that has answer file. But Customize virtual machine is failing. When creating without answer file vm was creating properly. The problem might be in answer file. How can I identify what is the actual problem? I am usnig SCVMM 2012 R2 and G2 type of VM template.

Thanks in advance,
Mohak Mahato