Please look at this example
* new :PROPERTIES: :ID: 43b3de77-4074-47f2-9a4a-9cddebb33951 :END: ** Inverse problem :PROPERTIES: :CUSTOM_ID: sec:one :END: ** new title :PROPERTIES: :ID: f3c76e50-5be9-47f2-bad4-257166670481 :END: Two ids were generated by org-id-get-create. I thought that could be another solution to my problem. However, strangely enough org-ref-helm-insert-ref-link does not find these two IDs it only finds CUSTOM_ID. @John: you are the author of that package, why doesn't the function find the ID? Regards Uwe