We have a molecule, and have run two sets of  Gibbs energy calculation, making 
the charge disappear. One molecule has the normal charges, the other all the 
charges are doubled. Taking the dHdl results for both and plotting against the 
charge of a selected atom (charge based at each lambda value) should those 
results over lap?

I thought that they would, since charge only is being changed, and it is a 
linear function of lambda. However, are getting some deviation closer to the 
lambda=0 values for the normal charge, it is lower than the double charged 
molecule around lambda = 0.5

Can provide graphs etc when I am back at my workstation. 

Any suggestions on whether should be over lapping or what we may be doing 
incorrectly?

Catch ya,

Dallas Warren--
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