Hi Stephen,
My mobile app user has authorisations to create an attachments, I shared screenshot below:
ZSYCLO_DOKUMAN is role for this authorisation.
Also I could not debug methods of /SMERP/CL_CORE_KWDOCUMENT_DO class such as BDS_DOCUMENT_CREATE, DMS_DOCUMENT_CREATE.
I checked the configuration panel setting, some filters were defined,
I changed them but it did not work.. I am still working on this issue.
Thanks for helps
Mina