Posted by **bun** on Monday, May 28, 2012 at 9:18pm.

I am trying to calculate geometry optimization of cyclodextrin, however, the computer always show error 2070 in gaussian. I used sem-empirical pm3 and try pm6, and tried to find any method to do this work, but every try could not work. I hope any body on Jiskha can give me instruction. I really appreciate.

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