CCL:G: PCM Question

From: Mark Zottola <mzottola_-_gmail.com>
Subject: CCL:G: PCM Question
Date: Mon, 12 Dec 2011 13:23:11 -0500

In optimizing a complex between two neutral molecules using PCM with the MPW1PW91 functional I receive the following message within Gaussian:

PCMQM: There is more than one cavity, setting IComp=0.

THis message is repeated several times during the SCF routine. I reach an energetic minimum and that minimum is different than if I optimize the structure excluding the PCM keyword.

So my question is, what does this warning mean? Also, can I trust the energy minimum obtained with this warning?

Thanks!

Mark