ERROR: Attempt to de-reference a null object

Hello developers,

I have two dev accounts, in one account i have small project with classes,objects,visualforce tabs...

same to same i am copying all from one account to another completely. Now i am seeing this error in 'visual forcef' tabs

why this error, help me...

January 3, 2011
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SPrashant
try checking for HARD CODED IDs in your Code, that belong to your older org.

January 3, 2011
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alexb
The only way to find the exact problem is to look at the debug logs. Really, without a line number, it would be very difficult to find what the exact error is. So, your next step is to find a line number and class/visualforce page name in the debug logs. Go to that line number in the class or page and see what's there.

January 3, 2011
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ERROR: Attempt to de-reference a null object

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