Error:Unable to invoke adapter service

I am receiving below error message contineously as the connection with SAP is not there.

[ART.0114.1007E] Adapter Runtime: Error Logged. See Error log for details. Error: [ART.117.4002] Adapter Runtime (Adapter Service): Unable to invoke adapter service

For temproraily stopping the error I have disabled the WmSAP package.
What is the cause of this error and the best possible way to stop this error if we are not using connection with SAP anymore?

We are using webmethods version 7.1.2 & SAP Adapter version 6.5.