gpg: decryption failed: No secret key

I created a key with gpg4win and sent it to a vendor to ecrypt files. The files I received can be decrypted using Kleopatra withoutr any problems. However, when I run them through a batch process that executes command lin gpg I get the following error:gpg: decryption failed: No secret key.

I have verified the key exists, but I notices the pubring.gpg and secring.gpg files are empty.

Any help would be appreciated.