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Receiving: "errorCode" : "CMN-101", "message" : "Parameter [answeringRule] value is invalid."

  • February 4, 2026
  • 1 reply
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We are using .NET code to post audio files to the RC system for callers to automatically here when they dial a specific number. Code has been working fine past two years or so and today we started receiving the error when the code tries to post the audio file to the endpoint:

Content: { "errorCode" : "CMN-101", "message" : "Parameter [answeringRule] value is invalid.", "errors" : [ { "errorCode" : "CMN-101", "message" : "Parameter [answeringRule] value is invalid.", "parameterName" : "answeringRule" } ], "parameterName" : "answeringRule" } Request: Method: POST, RequestUri: 'https://platform.ringcentral.com/restapi/v1.0/account/~/extension/~/greeting?apply=False'

 

The current greeting answering rule ID we are using is: business-hours-rule

Has there been a change or something on the API end?

Best answer by PhongVu

Can you doubler check if your account is already migrated to the new User call handling framework. Please see the instruction in this dev guide to detect that, and if so, check the section below for new methods
https://developers.ringcentral.com/guide/voice/call-routing/user-call-handling/migration-guide#how-to-manage-user-call-handling-state-based-rules-via-api

1 reply

PhongVu
Community Manager
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  • Community Manager
  • Answer
  • February 5, 2026

Can you doubler check if your account is already migrated to the new User call handling framework. Please see the instruction in this dev guide to detect that, and if so, check the section below for new methods
https://developers.ringcentral.com/guide/voice/call-routing/user-call-handling/migration-guide#how-to-manage-user-call-handling-state-based-rules-via-api