Thanks @dkayiwa I raised this issue already here New version of CIEL concept dictionary added to dropbox I have the latest version of ref app released 30th April. As I wrote to @akanter and @raff I have platform 2.2.0 with the corresponding addons 2.9.0 However, there is no concept dictionary dump for platform 2.2. Only for 2.1 which used and @akanter says it should work. So now I don’t know how to proceed.