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wittymadder新蟲 (正式寫手)
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[求助]
關(guān)于高斯不能正常終止求助 已有1人參與
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這是一組9999錯(cuò)誤。 不知道為什么用輸出文件得到的結(jié)構(gòu)不可以繼續(xù)算 gaussian03直接就顯示2070錯(cuò)誤 (新手 希望可以得到解答) |
木蟲 (小有名氣)
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你這應(yīng)該是優(yōu)化計(jì)算不收斂,不知道我下不了你的out文件,被瀏覽器禁了,不過我猜測(cè)你的文件這個(gè)錯(cuò)誤信息前面應(yīng)該有類似: Maximum Force 0.020301 0.000450 NO RMS Force 0.007068 0.000300 NO Maximum Displacement 0.078972 0.001800 NO RMS Displacement 0.023716 0.001200 NO 這樣的語句吧, 你的問題應(yīng)該是 優(yōu)化不收斂,原因有好幾種可能:(給你貼一些建議) Geometry optimizations usually fail to converge for one of a few reasons. If your initial starting structure is not good, then you should ask if you can provide a better starting structure, for example, one optimized at a lower level of theory. However, if it looks as if the structure is converging to what you want, as seen in your visualizer of choice, then one should restart the optimization from the last step, for example by using geom=allcheck in the route line, and it generally is a good idea to also use opt=CalcFC in these situations if it is not too expensive (say HF or DFT). If your starting force constants matrix (Hessian) is poor, use a better one. This typically manifests itself when they vary a lot between levels, or if there is a large geometry change during the optimization. One can carry out a series of linked jobs (--Link1--). If you have a previous job, then usually Opt=ReadFC works well, but occasionally Opt=CalcFC, or rarely Opt=CalcAll are needed. In these cases, the forces are often converged, but the steps are not, and the final output will look like Item Value Threshold Converged? Maximum Force 0.000401 0.000450 YES RMS Force 0.000178 0.000300 YES Maximum Displacement 0.010503 0.001800 NO RMS Displacement 0.003163 0.001200 NO Rarely, the coordinate system itself may be at fault. If z-matrix coordinates are being used, then in some cases, poor choices can be made, which result in angles, or three consecutive atoms of the four atoms used to define a torsion angle (dihedral angle) may be collinear (the angle is close to 0 or 180 degrees), which can give problems. In this case one can either formulate a better z-matrix or use the default redundant internal coordinates. If these methods fail, another option would be to change the optimization method from the default to another type, such as opt=ef (if the number of variables is less than 50) or opt=gdiis (for floppy molecules). 我的建議是,你先不做優(yōu)化,直接坐energy計(jì)算,如果不能收斂,那說明你的初始結(jié)構(gòu)是有問題的。其他則可以參考上面貼出來的信息 |
鐵桿木蟲 (正式寫手)
你給出的輸出文件是正常結(jié)束的;你要求助,你也應(yīng)該把你出錯(cuò)的輸入文件、輸出文件傳上來,或者把出錯(cuò)那段信息貼出來才有用。就這么求助,誰能幫你啊 |
新蟲 (正式寫手)
新蟲 (正式寫手)
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