How to ignore an error inside a loop

Hi,

I have a workflow with an Optimization loop. Unfortunatelly some combinations of values used in the optimization are not compatible with the algorithm String Matcher ( beacuse 2*weight(switch) must be >= weight(insert)+weight(delete)).

When there is an error I would like to go on with the loop with the next combination of values ignoring the error... How to do this? I tried to use the  Try catch nodes but, as you can see in the workflow attached, I am not able to ignore the error.

Please, could you help me?

Thanks in advance