[gmx-users] Problem with the autocorrelation of Rg

[faride badalkhani]

Dear GROMACS users,

I am performing umbrella sampling on a polymer-ligand system and I generate
configurations successfully but the problem is that when I plot the
autocorrelation function of Rg for each window it is zero for the whole
time of simulation. I changed the run time for each window but nothing
changed. Moreover, the initial polymer-ligand structure is equilibrated
well.
Any comment or suggestion will be greatly appreciated.

Best,
Farideh