Error while parsing deployment manifest: The element DTSDeploymentManifest has invalid child element ConfigurationFile.

Hi

I am am running VS2012 on a 2012 windows server

I have designed a package in VS2012 and it uses a config file to store password of oracle schema to which one of the connection managers refers to. I build the package, and when I run the deployment manifest file (so I can access the package from sql server and run it with an sql agent job) I get error:

Error while parsing deployment manifest: The element DTSDeploymentManifest has invalid child element ConfigurationFile.

I have not found this exact error on a google search, and to my knowledge I have not done anything different with this deployment........Any ideas?