Warning 12200
WARNING - 12200
Schema validation warning
The provided XML does not conform to the Twilio Markup XML schema. Please refer to the specific error and correct the problem. ## Warning - 12200
Schema validation warning
The provided XML does not conform to the Twilio Markup XML schema. Please refer to the specific error and correct the problem.
Possible Causes
- Misspelled verbs
- Incorrect case for verbs; TwiML is case-sensitive, so <Say> works, but <say> will not
- Misspelled or unknown attributes
- Unknown or unexpected nested elements.
Possible Solutions
- Check the line and column reported by the warning to see what part of your XML response caused the complaint
- Verify that your application server is accepting and properly responding to any custom parameters you may be passing
