In gaussian when I do the 《fopt freq M052X/6-311G(d,p)》analysis and some other times with another method and basis sets I face to notice (no special actions if energy rises).
What should I do?
Subhrashis Banerjee
It is absolutely okay in Gaussian calculations. But, sometime if your system is very large along with that message you may encounter this message also " Defaulting to unpruned grid for atomic number X"(X=atomic number). At this point the job may crash as Gaussian is unable to handle that large system. Then you have to modify the system or start with very less computationally expensive functional and basis set.
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