restart PMF calculation: what is "lambdaRef" output?

From: Sebastian Stolzenberg (s.stolzenberg_at_gmail.com)
Date: Tue Oct 14 2008 - 12:37:22 CDT

Dear All,

I started a PMF with N steps and it stopped at n<<N steps - Now I need
to restart.

The last recent output is:

FreeEnergy: nstep time(ps) task lambdaKf lambdaRef delta-G
#steps n*{value target |}
FreeEnergy: ----- -------- -------- -------- --------- ----------
------ -------------------
FreeEnergy: 2550000 2550.000 Up 1.00000 0.07000
6.21e-01 1050000 27.864 27.644 |

What is lambdaRef? Do I need to respecify this value, if yes how?

My script looks like this:
 
        urestraint {
                dist pmf group { (A, 8) }
                                group { (A, 45) } kf=20, low=28.37, hi=18.0
        }

        pmf {
                task = grow
                time = 1500 ps
                print = 1 ps
        }
        pmf {
                task = up
                time = 15000 ps
        }

Thank you,
Sebastian

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