After further research I determined that this problem occured because
I didn't set the source type and destination type. I will fill a bug
report about the message not containing enough information (by the
way, I'm running 10.5.6 as this is my target platform, this might have
been solved since
The process fails here and the log then contains the following:
An error occured while manually migrating document: Error
Domain=NSCocoaErrorDomain Code=134110 UserInfo=0xf336960 An error
occured during persistent store migration.
[6871:813] Error: {
reason = Can't add source store;
}
There
