multiplying data matrix by constants makes the scale matrix for inverse-Wishart not symmetric positive definite
data(optimism)
spec = specify_bsvarSIGN$new(optimism*10, p = 4)
post = estimate(spec, S = 2)
Error in estimate.BSVARSIGN(spec, S = 2) :
iwishrnd(): given matrix is not symmetric positive definite and/or df is too low
multiplying data matrix by constants makes the scale matrix for inverse-Wishart not symmetric positive definite