<p style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">Dear all,</p><p style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br /></p><p style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">I am trying to perform ab initio MD simulations on a plain water box containing 512 water molecules using the PW6B95 functional. The same input works flawlessly for smaller boxes containing 64, 128 or 265 molecules, but I can't seem to get it to work for 512 molecules. I always get the error message 'Cholesky decomposition failed'. Can anyone spot an error in the input? Also, what does this error message mean in detail? </p><p style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br /></p><p style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">Any help would be much appreciated!</p>
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