Object reference not set to an instance of an object

Question

I have a .NET project (windows forms) created in .net 3.5.

I added Error log code to this project and I deployed it in VS2010 with .NET 4.0 platform.

It successfully builds and creates the installer, but when I install this msi installer it shows the error "error:1001 ->Object reference not set to an instance of an object." and the installation gets rolled back.

If any one knows about this error please help me.

Run your installer from the debugger and see where it raises the exception. — ChrisF, May 06 '11 at 11:53

score 4 · Answer 1 · edited Oct 30 '12 at 10:56

One of the resons could be that Custom Actions data is missing. Make sure the variables/properties/data you are accessing in the installer's code(ProjectInstaller.cs) file is there in the custom actions data in Install section.

Click SetupProject
on top of solution explorer click Custom Actions
select Install->Primary output from project
Select properties.
check CustomActionData.(the variables used in the installer code file should be there in the property).

Hope this will solve your problem.

score 0 · Answer 2 · answered May 06 '11 at 11:54

0

Make sure the installer is actually copying all the dlls and other files to the installation directory.

answered May 06 '11 at 11:54

Andreas Grech

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Then try @ChrisF's suggestion. – Andreas Grech May 06 '11 at 12:06
no i hav services in my project.when i go with debugger its giving the error."you cant install it from the debugger/cmd." – user741685 May 06 '11 at 12:14
So this means you have installer class. Your null object is in that class. – Security Hound May 06 '11 at 12:26
http://stackoverflow.com/questions/125964/easier-way-to-start-debugging-a-windows-service-in-c – Andreas Grech May 06 '11 at 12:32

Object reference not set to an instance of an object

2 Answers2