title: I am solving a system of ODEs by using Xcos in Scilab 6.1.1, but the user-defined function gives me anerrors
body: <p>[I am solving a system of ODEs by using Xcos (SIRD infection model) in Scilab 6.1.1 version and I am using Windows 10 operating system, but the user-defined function gives me errors.</p>
  <p>Initial conditions: S(0)=10^7-1000; I(0)=1000; R(0)=0; D(0)=0.
  I tried to use 1/S block, but it does not accept vector initial conditions, so I used integrator block and I am not sure if is it correct or not. Please, I need your help to figure out this error. I am going to attach a screenshot of the Xcos file of the SIRD model simulation.</p>