title: Starting jbpm process with REST API with parameters and document attachment
body: <p>I am using jbpm version 6.5.0. I have requirement to call process through REST API and I am successful to start process with parameters.
  </p>
  
  <p>I am testing it with postman. The thing is that there is also requirement of document attachments on starting by REST API, for that I have followed link (<a href="https://access.redhat.com/solutions/2567701" rel="nofollow noreferrer">https://access.redhat.com/solutions/2567701</a> ) but unsuccessful  to attach document in same process. The REST API URI provided in followed link is </p>
  
  <p><a href="http://server:port/kie-server/services/rest/server/containers/%7BcontainerName%7D/processes/%7BprocessId%7D/instances" rel="nofollow noreferrer">http://server:port/kie-server/services/rest/server/containers/{containerName}/processes/{processId}/instances</a> this  is not working . I am stuck with containerName  in the link . </p>
  
  <p>Secondly, I have confusion i.e.  there are 2 uri which starts process on is for sending parameters on RESTAPI and other is for document attachment RESTAPI. Will both of the REST API called by the application which want to start process .
  I have check following to check containerName but unsuccessful.</p>
  
  <p><a href="http://localhost:8080/kie-server/services/rest/server/containers" rel="nofollow noreferrer">http://localhost:8080/kie-server/services/rest/server/containers</a>  running successfully with out containers list  </p>
  
  <p><a href="http://localhost:8080/kie-server/services/rest/server" rel="nofollow noreferrer">http://localhost:8080/kie-server/services/rest/server</a> running successfully </p>
  
  <p><a href="http://localhost:8080/kie-server/services/rest/server/containers/%7Bid%7D" rel="nofollow noreferrer">http://localhost:8080/kie-server/services/rest/server/containers/%7Bid%7D</a> Failure with msg Container id is not instantiated </p>
  
  <p>Kindly provide me solution or steps any tutorial which have clear steps to achieve the task .</p>