Hi Jurgen,
Thanks for your post.
i faced simialr issue while importing the SAP NW7.0 and it resolved as per your valuable post.
Issue resolved by following steps:
1.Go to /usr/sap/<SID>/JC<instance number>/SDM/program/config
2.Edited file # sdmrepository.sdc
3.Modified as below
from /usr/sap/<Source SID>/JC<Source Instace no>/j2ee/../../SYS/global/config/cm to /usr/sap/<Target SID>/JC<target instance no>/j2ee/../../SYS/global/config/cm
Regards,
Sandeep