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LTI Grading via Outcome Service Error

Question asked by Brad Pollack on Jun 7, 2018
Latest reply on Jun 7, 2018 by Brad Pollack

I am trying to submit a grade using the outcomes service in LTI. I am getting an error saying that "Assignment is no longer associated with this tool" even though I have not changed anything in Canvas. I successfully created an External tool that is accessed via the assignment selection and a correct LTI launch is created. The student can take the assignment in our externa tool. I retrieve and store the lis_outcome_service_url and lis_result_sourcedid all without any issued. Below is the outgoing and incoming XML data. Any suggestions on why this error is occurring? Thanks.

 

Sent XML:

POST https://canvas.castlelearning.com/api/lti/v1/tools/44/grade_passback HTTP/1.1
Content-Type: application/xml
Host: canvas.castlelearning.com
Authorization: OAuth oauth_consumer_key="10000000000001",oauth_nonce="a2ca4dd7-fbd3-4c02-a91d-f0b2ac0aaa6d",oauth_signature_method="HMAC-SHA1",oauth_version="1.0",oauth_timestamp="1528143703",oauth_body_hash="CGBtAm5hO3YmW5oRPaOw5iAw33Y%3d",oauth_signature="y6MHXjwRtsWV9Qm1Mva5koxiZvA%3d"
Content-Length: 922
Expect: 100-continue
<?xml version="1.0"?>
<imsx_POXEnvelopeRequest xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0">
  <imsx_POXHeader>
    <imsx_POXRequestHeaderInfo>
      <imsx_version>V1.0</imsx_version>
      <imsx_messageIdentifier>328753e3-4481-4740-9178-dea95b4891ca</imsx_messageIdentifier>
    </imsx_POXRequestHeaderInfo>
  </imsx_POXHeader>
  <imsx_POXBody>
    <replaceResultRequest>
      <resultRecord>
        <sourcedGUID>
          <sourcedId>44-2-36-2-c99355a5a89ae38d6aba3962270f91209842c2e9</sourcedId>
        </sourcedGUID>
        <result>
          <resultScore>
            <language>en</language>
            <textString>0.75</textString>
          </resultScore>
        </result>
      </resultRecord>
    </replaceResultRequest>
  </imsx_POXBody>
</imsx_POXEnvelopeRequest>
Returned XML:
HTTP/1.1 200 OK
Date: Mon, 04 Jun 2018 20:21:42 GMT
Content-Type: application/xml; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Set-Cookie: __cfduid=d4e3867388e6fd0fdb9d189f9b67034d91528143702; expires=Tue, 04-Jun-19 20:21:42 GMT; path=/; domain=.castlelearning.com; HttpOnly
Cache-Control: max-age=0, private, must-revalidate
X-Request-Context-Id: 5596e09b-8f51-487b-b085-1e4addbca9ed
Strict-Transport-Security: max-age=31536000
X-Canvas-Meta: o=lti_api;n=grade_passback;b=832988;m=832988;u=0.09;y=0.00;d=0.01;
X-XSS-Protection: 1; mode=block
X-UA-Compatible: IE=Edge,chrome=1
X-Frame-Options: SAMEORIGIN
X-Runtime: 0.101521
X-Content-Type-Options: nosniff
X-Powered-By: Phusion Passenger 5.1.2
Vary: Cookie
ETag: W/"1ae369aa41efa1f3ea4a550573488c7b"
Status: 200 OK
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Server: cloudflare
CF-RAY: 425d1b7ded911ff4-DFW
39d
<?xml version="1.0" encoding="UTF-8"?>
<imsx_POXEnvelopeResponse xmlns="http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0">
        <imsx_POXHeader>
          <imsx_POXResponseHeaderInfo>
            <imsx_version>V1.0</imsx_version>
            <imsx_messageIdentifier/>
            <imsx_statusInfo>
              <imsx_codeMajor>failure</imsx_codeMajor>
              <imsx_severity>status</imsx_severity>
              <imsx_description>Assignment is no longer associated with this tool
[EID_10000000000149]</imsx_description>
              <imsx_messageRefIdentifier>328753e3-4481-4740-9178-dea95b4891ca</imsx_messageRefIdentifier>
              <imsx_operationRefIdentifier>replaceResult</imsx_operationRefIdentifier>
            </imsx_statusInfo>
          </imsx_POXResponseHeaderInfo>
        </imsx_POXHeader>
        <imsx_POXBody><replaceResultResponse/></imsx_POXBody>
      </imsx_POXEnvelopeResponse>

Outcomes