Using different mode compute have different result

hi! I am trying to replicate sw2003 in dynare .when i run the bayesian estimation ,i find that using different mode_compute have different results.mode_compute=6 and 7 is ok. but others is not very satisfying , matrix is not positive definite. why is that happen data.mat (5.2 KB)
sw_euro.mod (5.2 KB)

Mode-finding is hard and it is not uncommon for mode-finders to get stuck at local optima.

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