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ASP.NET: Object reference not set to an instance of an object.

Posted on 2010-11-21
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Last Modified: 2012-05-10
Hello,

We have developed a website and right now, it is running on the production environment.

It is running great on production environment but sometime it gives an error "Object reference not set to an instance of an object."

As of now, we have done concrete the problem. When user clicks on pop up window and close that window and Asychronous request goes to close that window. After that instantly click on "Update" button then this error comes.

It means that Page is not rendered properly.

Can anyone give assistance on it i.e. how to resolve it?

It is an urgent if some one assist me.

Best Regards,
Mohit Sharma
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Question by:MohitPandit
8 Comments
 
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Expert Comment

by:Bardobrave
ID: 34185948
This error means that your code is trying to use an object that is not instantiated on the moment your code try to call it.

Maybe the window you close is the one who instantiates the object, and when you close it, this object is sent to memory cleaner, so when another part of your code tries to reach it the exception is fired.

You should stretch the line where the error is raised and see what object is being called. Then you'll be able to see clearly what's happening.
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LVL 11

Expert Comment

by:SAMIR BHOGAYTA
ID: 34186221
Hello,

May be your code is trying to use the object which is not instantiated into your code. OR may be the database is not properly connected at the time of pass the query for that page.
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Expert Comment

by:meispisces
ID: 34186788
Post your code.. this would be helpful to see where the error is..

thanks!
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LVL 2

Expert Comment

by:dinudany
ID: 34186802
hi...,
can you please explain, what is the window you have used for pop-up.
is it a JavaScript pop-up or a child instance of the parent window.
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Author Comment

by:MohitPandit
ID: 34205008
Hi dinudany,

We are using Telerik: RadwindowManager.

FYI only, we grab the issue. I tried to same "object reference" error from other development machine but we couldn't. So, we created new published code from that development machine and tried to replicate but error didn't come.

It means that there is problem with old development machine from where we created published code everytime.

Do you have any suggestion on it?

Regards,
MohitPandit
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Author Comment

by:MohitPandit
ID: 34210885
Any Suggestion?
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Accepted Solution

by:
MohitPandit earned 0 total points
ID: 34309328
Hello,

I found this file "BrowserFile.browser" in App_Browser folder in published code. After remove it, it doesn't through any "Object Reference" error

Regards,
Mohit
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Author Closing Comment

by:MohitPandit
ID: 34341514
I found myself. thanks
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