Restart file 2

Hallo again, I belive that the restart option [RSOFN] is not convenient for our coupled model. What we need is a restart option which allows us to stop the model and restart it without starting at day 0. I know, if I start the w2_ivf.exe I can stop the model by pushing the stop bottom and restart the model by pushing the restart bottom. Does anybody know whether it is possible to stop and restart the model from outside (with an Fortran statement)? I hope anybody can help me. Thanks. Michi