Consider some function

function[mass_,lifetime_]:=NDSolve[{equations[mass,lifetime], initialconditions},functions,{t,t0,tmax}]

Let us assume that there is some kind of numeric instability in this function related to the syntax I used. Namely, for some values of parameters (like mass = 0.05, lifetime = 0.03), it is evaluated without any problems (apart from some warnings which may be neglected), but for some very similar values (like mass = 0.05, lifetime = 0.0301) it returns an error like

NDSolve::mxst: Maximum number of 50000 steps reached at the point t ==


I need to make a table

table = Flatten[Table[{mass,lifetime,function[mass,lifetime]},{mass,massvalues},{lifetime,lifetimevalues}],{2,1}]

Is it possible to re-define the table such that rows with the error will be marked somehow?


tableModified = Flatten[Table[{mass,lifetime,label,function[mass,lifetime]},{mass,massvalues},{lifetime,lifetimevalues}],{2,1}]

for which label = 1 if the mentioned error has not occurred and label = 0 if the error has occurred?


Try to use Check. For example:


  • $\begingroup$ Thank you. But will it work for arbitrary details of message (maximum number of steps reached at different times)? $\endgroup$ – John Taylor Nov 8 '20 at 10:07
  • $\begingroup$ @JohnTaylor If you want to check any message, you can omit the last argument of Check (that is, MessageName). $\endgroup$ – Wen Chern Nov 9 '20 at 12:27

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