Dear All,

       After I used QMERA-Geometry Optimization,the structure had 4 or 5 virtual frequency.According to this,I usually use Tools-Vibrational Analysis-Calculate to find the virtual frequency and see the corresponding .xtd Animation.Then I open the Animation Options to copy a seemingly frame to make the next optimizaton.However,the method looks still could not clear these virtual frequency,even produce more.I would like to ask is there any better way to solve this problem?