Hi everybody!

i was doing a DSGE model using bayesian technique. when i set in the “estimation()” with “mode_compute = 4”, i got note:

??? Error using ==> chol

Matrix must be positive definite.

Error in ==> metropolis_hastings_initialization at 52

d = chol(vv);

Error in ==> random_walk_metropolis_hastings at 58

ix2, ilogpo2, ModelName, MhDirectoryName, fblck, fline, npar, nblck, nruns, NewFile, MAX_nruns, d ] = …

while after using optimization routine “mode_compute = 6”, i can get the estimation results, but the Bayesian IFRs are not desirable, most like sharp cliffs or responses in big scale between each plot.

i don’t know what to do next. any help is much appreaciated！

eric