The following meta-model update pack should be applied to your repository when using the Essential Integration Server, in particular for importing pre-existing Essential Architecture Manager repositories.
NOTE: This update is already included in Essential Architecture Manager v.1.1 and should only be used for version 1.0.
The update adds the external_repository_instance_reference slot to the EA_Relation and :EA_Graph_Relation classes.
To apply the script:
execfile("[FULL PATH TO THE DOWNLOADED SCRIPT FILE]
Note the use of the Unix-style directory/folder separators - even on Windows.
When the script completes, success messages will be displayed.