How to handle exception for combobox selection?

[n-2204]

Hi,
I have added combobox in my table(Qtableview) in column 2 &3
in combobox values are a,b,c,d,e
case1. is user can select combo1->a combo2->b if user select other than this then it should not crash.
this is valid scenario how should i add exception so if user select other than this ordr it should not crash ?
1. combo1->a combo2->b
2. combo1->a combo2->c
3. combo1->c combo2->d
4. combo1->d combo2->e

Please suggest !!

[VRonin]

Run a debugger and crash it. it will show you what went wrong

[n-2204]

I need to prevent based on combobox selection i'm doing some calculation ..
so i want user to select the values is such a way.. what to do in this case?
if user select other values as i mentioned how user should select.

[JonB]

@n-2204
Are you still asking about crashing or something else, in which case what? No, there should be no exceptions raised in any case.

[n-2204]

ok. Thankyou