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FlyTreeView (ASP.NET)

Technical support and KB related to the FlyTreeView control

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Error when performing server callback
Link Posted: 02-Dec-2007 12:16
rawaho avatar
rawaho
Total Posts:0
Joined:4/30/2024
Hi,
I'm running into some issue from time to time, but now it occurs each time I try to populate on demand.
The error message is:
Error when performing server callback:
Object reference not set to an instance of an object.120|/ followed by a combination of characters, digits and special characters like + and /.

If it appears sometimes, I just need to give the tree some more time to load and it works fine with exactly the same code. Now, it happens no matter how much time I wait before clicking to populate. I'm using version 4.3.1.140

Do you have a hint what to look for?
BR,
rawaho
Link Posted: 02-Dec-2007 19:15
EvgenyT avatar
EvgenyT
Total Posts:0
Joined:4/30/2024
Do you use callbacks for populate on demand?
Is it possible to get access to the page you have problems with?
Or ASPX code, that we can run and debug locally?
Link Posted: 02-Dec-2007 21:18
rawaho avatar
rawaho
Total Posts:0
Joined:4/30/2024
Hi,
thanks for the info. The tree is part of a Sharepoint webpart with neither AJAX-UpdatePanels nor handling the populate event manually, so from my point of view it is populated on demand using callbacks. Unfortunately, you can't get access to the page.
How to proceed?
BR,
rawaho
Link Posted: 02-Dec-2007 21:31
EvgenyT avatar
EvgenyT
Total Posts:0
Joined:4/30/2024
We need to reproduce the problem somehow.

Could you run your app in a debug mode. And put here the stack trace?
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