Importing ReqIF data into DNG 6.0 M8 fails

Hi all,
I tried to import a ReqIf file generated from DOORs 9.6 into our CLM 6.0 M8 installation.
It always fails.
here are the errors I get in the report:

Summary
	Errors importing types.
Data Types
	Failed to update resource https://<serverUrl>/rm/types/__aYPgbEMEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_dce263b0-35b6-43a7-a74d-0a3e7f04e544
URI	https://<serverUrl>/rm/types/__aYPgbEMEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_8uFd0bELEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_49cb97f4-978c-489f-bc3a-1512b01d3d93
URI	https://<serverUrl>/rm/types/_8uFd0bELEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_81FdsbELEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_867a7368-41af-45a7-b25b-a9b40a3b3ef5
URI	https://<serverUrl>/rm/types/_81FdsbELEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_87fnsbELEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_aef529ac-c039-4b58-b179-5d35bbcf4f48
URI	https://<serverUrl>/rm/types/_87fnsbELEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_AiDpQbENEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_87ad0022-eeca-444d-b0d8-0ef0e06f17fb
URI	https://<serverUrl>/rm/types/_AiDpQbENEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_A3qF0bENEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_fe807864-01a6-44d5-a970-94a1498d3f5a
URI	https://<serverUrl>/rm/types/_A3qF0bENEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_BI8qIbENEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_3fe21cd1-55ee-435f-b69a-e5a2351047fd
URI	https://<serverUrl>/rm/types/_BI8qIbENEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_Bp4M8bENEeSXh4loh3_U4w; status received = 404.: type not found in project's type-system
ReqIF ID	_d78623aa-6bf6-45d8-9d67-36bc4b6c8c59
URI	https://<serverUrl>/rm/types/_Bp4M8bENEeSXh4loh3_U4w
Attribute Definitions
	Failed to update resource https://<serverUrl>/rm/types/_rVV-cbENEeSXh4loh3_U4w; status received = 403.: CRRRS8601E You cannot change [http://www.ibm.com/xmlns/rdm/rdf/range] to [https://<serverUrl>/rm/types/_BNHYcbENEeSXh4loh3_U4w].
Name	Safety Relevant
ReqIF ID	_3eb092ff-1f13-4439-80f6-71a3c060cdb1
URI	https://<serverUrl>/rm/types/_rVV-cbENEeSXh4loh3_U4w
	Failed to update resource https://<serverUrl>/rm/types/_w5CQgbENEeSXh4loh3_U4w; status received = 403.: CRRRS8601E You cannot change [http://www.ibm.com/xmlns/rdm/rdf/range] to [https://<serverUrl>/rm/types/__aYPgbEMEeSXh4loh3_U4w].
Name	ASIL
ReqIF ID	_c46034f2-0c54-468a-920a-55975f6b68ff
URI	https://<serverUrl>/rm/types/_w5CQgbENEeSXh4loh3_U4w

Perhaps someone here can give a hint, other wise I will open a workitem.

I tried this several times with users that had JazzProjectAdmin roles and as well the ReqIF related permissions in the RM Project Area.
I use Firefox 31, (but since the ReqIf import happens server side I guessed this is not really a relevant item).
Perhaps it could be important that we have as well installed RDM6.0M8 on this JTS and that we seem to ran into this defect, which was actually producing this issue