ZLB implemention and occbin_constraints

Dear professor,thanks for your reminder,I have solved my problems by the shock(surprise).Wish you all the best!

Dear Professor. I wrote my own code for global solving, where I called Sims’ cslove.m code. But I got the error: Warning: The matrix is close to singular value, or scaled incorrectly. Results may not be accurate. I wonder why this error occurs, for example during the solution of dynare.
Thank you !

Equation solving usually involves inverting matrices. But if the matrix is close to singular, this inversion will be associated with large numerical errors.

Thank you!