Thanks Matthew, for your response.

I don't believe the problem is with type. I tried with $, but getting the null pointer exception. <.Values.common >: nil pointer evaluating interface {}.mypath. I believe there's some scoping issues or some hidden bug, because if i remove the sub charts then parent chart is able to resolve the value, but if i have the sub charts then it barfs about the issue.

Regards,
Lokesh