DeSolv

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DeSolv

jacksonan
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I have the following differential equations:
dCgd.dt = -kad*y[1]-kgd*y[1]     # PK model equation gut d
  dCld.dt= kad*y[1]-rhyd-rmetd       #pk model equation liver d
  dCgl.dt = -kal*y2[1]-kgl*y2[1]     # PK model equation gut l
  dCll.dt= kal*y2[1]-rhyl-rmetl       #pk model equation liver l
 
 
          # PK model equation
  return(list(c(dCgd.dt,dCld.dt,dCgl.dt,dCll.dt),c(massbalance=sum())))
}

I am getting an error in my out statement:
Error in func(time, state, parms, ...) : object 'p' not found
out = dede(y=y0,times=times,func=model.LIDR,parms=parms)

Can some one tell me why and hot to fix the error?