pub.schema:validate is failing the validation


In the development server pub.schema:validate is working fine but in the testing server the validation of the same xml is geting failed.
The error is as follows:

pathName: /RootNode
errorCode: NV-003
errorMessage: [ISC.0082.9003] Unable to locate a matching element declaration

The same package has been deployed in both the servers. I have tried reloading of the packages also but the error still continues.

Can you please suggest some solution to this?