Why I am getting this warning: Matrix is singular to working precision

[jpfeifer]

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Positive monetary policy shock with nominal interest rate falling?

Hey folks, i get very strange irf when i ran the following little monetary model. My problem is, when i look at the irf of U (the monetary shock) I would expect that when U rises R (the nominal interest rate) will also rise due to the standard taylor rule (R/Rss = (PI)^(jotaPI)*(Y/Yss)^(jotaY)*U;). But the opposite is the case. PLEASE WHERE IS THE MISTAKE?? Do I think wrong?? THE MODEL: close all var LAM R PI RK C W L Y A K MC B G U I RR TAX UTIL; varexo eps_A eps_U eps_G; parameters beta d…