Sorry, I tried to reply from my phone, but apparently that's not possible. What I said was that the E command is much more common than EN. The element number isn't specified with the E command. Just issuing solve instead of lswrite and then lssolve is recommended. RBE3 is a good way to attach a mass to the model. It's thought of as a force (mass) distribution construct and that's perfect for your application. I was skimming your input and thrown off by your description of RBE3 as linking nodes. Because of your use of older commands I was thinking possibly the error you are getting is due to using an old version. What is the current error message? Â
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