OAM cluster - unpack error CFGFWK-60550

I woud like to create a cluster for my OAM server (11.1.2.0.2) with WebLogic 10.3.5.
On my OAM server, I have successfully packed my domain (managed server) using the pack script to generate a jar file (/tmp/idm_domain.jar).
./pack.sh -domain=/opt/weblogic/system/user_projects/domains/OAM11gR2_domain \ -template=/tmp/idm_domain.jar -template_name="OAM Domain" -managed=true

 I copied this jar to my other server where I’ve created the same Middleware Home (/opt/weblogic/system) with the same binaries and when I attempt to unpack it I get the following error:
./unpack.sh -domain=/opt/weblogic/system/user_projects/domains/OAM11gR2_domain \ -template=/tmp/idm_domain.jar -log=/tmp/unpack.log