# missing producerId.

**URL:** <https://mediasoup.discourse.group/t/missing-producerid/1429>\
**Category:** mediasoup libraries\
**Created:** [July 12, 2020, 6:31pm UTC](https://mediasoup.discourse.group/t/missing-producerid/1429 "2020-07-12T18:31:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ming](https://avatars.discourse-cdn.com/v4/letter/m/71c47a/32.png) [@ming](https://mediasoup.discourse.group/u/ming)\
**Post date:** [July 12, 2020, 6:31pm UTC](https://mediasoup.discourse.group/t/missing-producerid/1429/1 "2020-07-12T18:31:49Z")

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Hello  
I’ve built a visual studio 2017 c++ project using libmediasoupclient library.

And everything was ok until creating sendtransport and recvtransport.

## But when I create server side consumer, it failed.

## json body = { { “producerId”, ProducerId } }; auto r = cpr::PostAsync( cpr::Url{ this-\>baseUrl + “/broadcasters/” + this-\>id + “/transports/” + this-\>recvTransport-\>GetId() + “/consume” }, cpr::Body{ body.dump() }, cpr::Header{ { “Content-Type”, “application/json” } }, cpr::VerifySsl{ verifySsl }) .get();

## status code:400 Type Error:missing producerId.

I’m using other peer’s producerId, and I’m sure that there is no problem with producerId.

What is the reason?  
Help me.

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<div class="post-metadata">

**Author:** ![jmillan](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/jmillan/32/9_2.png) [@jmillan](https://mediasoup.discourse.group/u/jmillan)\
**Post date:** [July 13, 2020, 1:34pm UTC](https://mediasoup.discourse.group/t/missing-producerid/1429/2 "2020-07-13T13:34:33Z")

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That’s a custom code, I can’t help here.