How to use Debugging features

[xzclwq]

Hi, I am a beginner of casadi and I have some troubles about how to use Debugging features of casadi because of no demo in Official documents。for example I use the opti.debug.show_infeasibilities() in MatLab and it would occur following problem：
Solver failed. You may use opti.debug.value to investigate the latest values of variables. return_status is 'Infeasible_Problem_Detected'

出错 test243272024 (第 234 行)
sol = opti.solve();

opti.debug.show_infeasibilities()
Violated constraints (tol 0), in order of declaration:
------- i = 1/98 ------
0 <= 0 <= 0 (viol 0)
错误使用 casadi.OptiAdvanced/show_infeasibilities (第 309 行)
Error in Opti::g_describe [OptiNode] at .../casadi/core/optistack.cpp:532:
.../casadi/core/generic_type.cpp:332: Assertion "is_string()" failed:
Notify the CasADi developers.
could you help me? Thank you very mach!