loderzmj,
Are you working with a project which has more than one tsconfig.json file?
Unfortunately we don’t support multiple tsconfig files yet.You can change tsconfig used by our services in project properties to get the content assist working : Right click on the project > Properties > TypeScript and browse for different tsconfig.json.
I have filed an enhancement request for the dev team to support multiple tsconfig files.
Please let us know if you have any questions.
–Swapna
MyEclipse Support