Thank you for your response.
I imagined that this may be the case. However, when I run this code with a default (more simple) model, it graphs the shocks (I think with the simul command) for each variable and provides no warnings. I need to get the graphs so I guess that is my biggest issue. Is there an extra command I need to put? I will try a variety of things, however I just don't get why I would need to provide an extra command now and not in the previous model...