Error while running energyplus from external interface

While running energy plus from an external interface, I get the following error:

ExternalInterface: Received end of simulation flag at time = 120.00 hours

I am running the IDF for 5 days i.e. 120 hours. Can anyone help me solve it?

What co-simulation software do you use? The end of simulation flag is the proper way the external software has to inform EP to end the simulation. In my experience, this "error" does not influence the output in any way. One workaround is to set simulation time in the IDF to the same range or slightly smaller such that EP exits first. It then depends on the external software how well it can handle the end of simulation flag from the EP.