CIL generation error

Hi I am getting random CIL error like the following while doing an incrmental CIL for my Service class.

CIL generation: Method ‘Parmusedefaulttransactiononly’ in type ‘Dynamics.Ax.Application.AgreementConfirmationDP’ from assembly ‘tempDynamics.Ax.Application, Version=6.2.1000.1437, Culture=neutral, PublicKeyToken=null’ does not have an implementation.

CIL generation: Method ‘Parmusedefaulttransactiononly’ in type ‘Dynamics.Ax.Application.AgreementConfirmationDP’ from assembly ‘tempDynamics.Ax.Application, Version=6.2.1000.1437, Culture=neutral, PublicKeyToken=null’ does not have an implementation.

These are standard classes. i am not sure why this is happening. It does not show any error in Service class. but Inc CIL fails.
I deleted the aseemblies from XPPIL forlder,did a full CIL and Inc CIL but still it shows lot of errors unrelated to my service class.
I am not sure how to resolve this. Any insights?