Link type "Satisfied by/satisfies" in RDNG

Assume you have created both projects from a out-of-the-box project template and adapted those for your own use, and from there got the Satisfaction link type.

If you look at the Manage Project Properties > Link Types tab of your two project areas, you will see that Satisfies/Satisfied by are not system defined link types with RDF URIs. Think if you add the RDF URI to the link type definition (for example "http://mydomain/xmlns/rm/types/satisfaction") for both project areas, the DNG application recognizes the same link type on both sides and let you create it as cross project link.

If there are Two project area namely Avionics Requirement and Avionics Test Description, I would like to create link between requirements of project area Avionics Requirement and requirements of Avionics Test Description Project Area  using the link type Satisfied by/satisfies but the Project combo box is disabled for selection but for link to/from and others it is enabled. The users is having administrator process role for both the project area. Why the project option is disabled, if the link type satisfied by/satisfies is selected?

What version are you running and have you added both projects into a Global Configuration?