Decryption Key Compatibility between GNUPG V 2.030 and GnUPG 2.0.27

[Robert J. Hansen]

> Could this issue be due to the difference in GPG version between the 2 servers?

Unlikely.  It's much more likely that you only imported the public key on the Production box.  On the Production box, try this:

C:\> \path\to\gpg.exe --list-secret-keys

If the key isn't listed there, then you forgot to import the private key.  If that's the case, give a smile and move on -- it's a common mistake, and one pretty much everyone here has made at least once.  :)