How to update an existing Requirement through OSLC interface

Hello everyone,

I am using the Codebeamer server(2.2.0.1) as an OSLC server. With the helps from others in this forum, I was able to GET a requirement using server:port/api/oslc/projects/{proj_id}/rm/requirements/{req_id}.

Now I want to update this (exisiting) requirement. How can I do it please?

I tried to PUT the modified XML return (from GET) to the same URL above. This is how DNG works if I understand it right. But I got an error message "Check that the you spelled the address correctly." (looks like a typo in the error message from CodeBeamer here). I double checked that I am using exactly the same URL.

Also CodeBeamer doesn't return any CreationFactory like DNG. If I need to create a new requirement, how can I do it please?

Thanks for your help in advance.