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ramji013 without a little more context, it is hard to assist much, as wparker pointed out. I will also add that if you have large collections of objects though, it is often better to insert them all into the Clara session separately or “extract” them in a rule and perform the inserts in the RHS (right-hand side) of the rule. From there you can assert the validity of objects in a object-at-a-time sort of pattern matching. This can be helpful if you wish to then perform joins to/assertions with types of objects in the session’s working memory with these objects that you have decided were “valid".