UT theoretical chemistry code forum

Dear Dr. Graeme,

It works wonderfully! Thank you very much for your prompt support!

Best regards,

I am attempting to perform a vibrational analysis on my system, which is a huge organic molecule (DMMP) adsorbed on a TiO2(110) oxide. However after the calculation was done, while extracting the frequencies using dymmatrix.pl, I encountered an error stating:
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Building Hessian matrix
Illegal ...