Out of stack error

[Kleinen]

I have a program that at startup must fill a treeview. However one branch of the treeview is getting very huge. In fact so huge that I get an "Out of stack" error.

Is there some way in VB that I can change the stack size?

TIA

 

[chiph]

Are you using recursion to fill the tree?

That's where people usually get the "out of stack space" error.

Chip H.


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[Kleinen]

yes I am using recursion to fill the three

 

[chiph]

Then you likely have some uncontrolled recursion.

I would put logging code into every function that you call when building the tree, and when you get the out-of-stack error, you can examine the log for out of control recursion.

Chip H.


If you want to get the best response to a question, please check out FAQ222-2244 first

 

[ferretrunner]

you could also follow the code step by step with the little red circle thingys. (click to the right of a line & it will automatically debugg when it gets there)

 

[chiph]

Or.. you could set breakpoints like ferretrunner says. But I've found that when tracking recursion problems down on a form, the act of debugging causes problems as focus changes from your program to the VB IDE, and back again.

You can minimize this problem by running on a PC that has dual monitors (VB on one, program under test on the other one). Or you instrument your code like I suggested earlier.

Chip H.


If you want to get the best response to a question, please check out FAQ222-2244 first

 

[Kleinen]

Problem solved. I changed the code a little so that the recursive part of the filling of the treeview is less extended.

Thanks for the suggestions

 

[SemperFiDownUnda]

One thing I've found is that, especially with the treeview, is to populate a branch only when it is expanded. Why populate a whole tree view if they only go down one branch?
When you populate a branch put in a child node for each element you add. This node is a dummy node that will be removed when you do the real populating but will cause its parent to have the + - box. Explorer used to behaive like this. If yo want the newer behaivor you'll have to populate 1 level lower then what is visible.

Both these problem solve the recursion problem as you only go into the routine when a branch is expanded.


Hope I've been helpful,
Wayne Francis

If you want to get the best response to a question, please check out FAQ222-2244 first