I am trying to create a group conversation using the Twilio Conversations API. I am currently following the "Group Texting in Conversations: Scenario 1" tutorial in their documentation using cURL.
(I'm obviously not going to post my Twilio Account SID or Twilio Auth Token in the code snippets below, but I am entering the tokens on my machine.)
I can successfully create a conversation sid (Step 1), using the following command:
curl -X POST https://conversations.twilio.com/v1/Conversations --data-urlencode "FriendlyName=orderId" -u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
I can successfully add a chat participant using the conversation sid (Step 1), using the following command:
curl -X POST https://conversations.twilio.com/v1/Conversations/CHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Participants --data-urlencode "Identity=chatParticipant", where CHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX is the conversation sid returned from the command above.
I can successfully add an SMS participant (Step 3) using the same conversation sid.
curl -X POST https://conversations.twilio.com/v1/Conversations/CHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Participants --data-urlencode "MessagingBinding.Address=+18001234567" -u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN, where +18001234567 is my personal cell phone number (not my Twilio number).
When I fetch the conversation participants using the same conversation sid above, my two participants are listed in the response from the following command:
curl -X GET 'https://conversations.twilio.com/v1/Conversations/CHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Participants?PageSize=20' -u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
However, at Step 4, after running the "send a message" command:
curl -X POST https://conversations.twilio.com/v1/Conversations/CHXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Messages --data-urlencode "Body=this is a test message" --data-urlencode "Author=chatParticipant" -u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN,
I am presented with the following error:
{ code: 50435, message: 'Group MMS activation failed', more_info: 'https://www.twilio.com/docs/errors/50435', status: 412 }
There is no entry in the documentation for error code 50435. The "more_info" link provided leads to a 404 page. Both my Twilio number and personal cell phone number supports both SMS and MMS messaging. I am really at a loss for how to debug at this stage. Any recommendations would be greatly appreciated!
Twilio developer evangelist here.
Sorry that the error URL is a 404 right now. I am seeing what I can do to get that published.
There are a few reasons that a 50435 error might show up though. In this case it appears that there is a chat participant in the conversation without a projected address. In this case, that participant is your step 1 participant with the ID "chatParticipant".
You should be able to update the participant using the API and give them a projected address (a Twilio number that is used in the group MMS). Then you should be able to send messages between your participants.
Let me know if that helps.