I'd like to select individual frames from my equilibration run to start separate production runs. I've saved coordinates at various points of the equilibration and when using them to start the production runs I get an 'Energy Change Tolerance Exceeded ' error. I'm using an NPT ensemble and I'm thinking that the box size has changed which is resulting in the error. I was wondering if I could just read the equilibration restart file at a particular location in order to vary the starting point of the production run?