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I have a pset that I created and used successfully several times. Now a bunch of the DGNs are missing from the pset. I tried creating a new pset with the same list of DGNs I had before and now it isn't recognizing the fence shape I entered for half of them, but does recognize the other half. I have confirmed that the shape is still on the same level and in the same place it always was in in all of the DGNs. Has this happened to anyone? What else can I check?