Opening a project in 10.2

Question

Hi OPA enthusiasts
I have a project in 10.1 it works fine. I tried opening it on my other machine which has OPA in 10.2 and I get a lots of build error detailing:
Type     Severity     Description     File
Model     Error     Entity 'otherparty' is defined in more than one document, and the containment relationships do not match.     
Could anyone please advise.
Thanks

Answer 1

I just had a six hour adventure resolving this same issue. In my case, the root of the problem was that, in my 10.1 rulebase, I had entity-level error and warning event rules that did not use Exists(). For example, in a rulebase with a "global-->the employer" relationship, I had rules like:
Error("You must make a selection.") if
the type of the employer = "Select one"
During the upgrade to 10.2, it seems as though a new relationship was created ("all instances of the employer") to deal with the "relationship gap" in this rule. As a result, OPA's internal data model had two relationships ("the employers" and "all instances of the employer") connecting the same two entities. (This is all just a theory, by the way.)
To resolve the conflict, I had to do two things: First, I had to change event rules like the one above to:
Error("You must make a selection.") if
Exists(the employers, the type of the employer = "Select one")
Second, I had to click on each of the build error messages and, in the window that popped up, change the text of any offending relationships to "the employer."
M