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Input file adds extra grid points after sucessive runs

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Hi, I usually post in FEMAP forum but this appears to be a Nastran problem (my problem). I generate a simple beam model and mesh it with beam elements. I run it, post process, everything normal. Now I reanalyze and it appears to duplicate and add the grid points in the card file. I am not sure if that is where the issue is but it fails with: message 9137 (SEKRRS). My element orientation may have been at the root of the issue prior but I can not pin down what is going on. Any comments would be great. Thanks,