I don't know in advance which of them are redundant; moreover I am surprised if better scan of configuration space is something weird. Anyway I removed some windows (see histograms here http://picasaweb.google.ca/117558205101329348732/G_wham#5511287294315721970) and now PMF profile is 0.000000e+00 anywhere along z... Any ideas? Alex Looks to me like your windows overlap too much - there is complete redundancy in many of them, such that it looks like several of your windows are completely unnecessary. See the example histogram in the PMF tutorial for a more "normal" histogram. -Justin
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