Hi all, I'm new to drools planner and liking it a lot! I spent some hours last night cracking my head on something. I have switched my domain from planning variable pointing to planning facts to using chained planning variables. I ran into a problem with score corruption, which was surprising as I am still using a Simple Score Calculator. It turns out my problem was when cloning the solution the planning variable (now chained) was still pointing to entities in the old solution. I was following along the user guide when I fell over this. I'd like to humbly suggest that the drools planner user guide include a note/warning/something in the chained variable section about ensuring that when cloning the solution, the chained planning variables are updated to point to the cloned planning entities. There is currently no mention of solution cloning in this section, and the code included in the doc does not mention this either. This is illustrated in the examples, e.g. TSP, but it's in the Solution, not the planning entities. Just hoping to save others the head scratching. Thanks! Taylor -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Planner-Chaining-Cloning-Documen... Sent from the Drools: User forum mailing list archive at Nabble.com.