PRB: System.NullReferenceException

[ishekara]

Hi,

Strange, I am having a .Net C++ managed dll project, where in i call a new
on a non managed code. This however is giving a problem,
I get an exception saying "An unhandled exception of type
'System.NullReferenceException' occured in Mydll.dll" "Additional
information: Object reference not set to an instance of an object",

class mycpp
{
}

__gc public class myclass
{
public:
myclass()
{
m_cpp=new m_cpp[10]; // this line gives me the error.
}
private:
mycpp *m_cpp;
}

However i have another test project where i wont get this error. Thats why i
called it as strange.

Please let me know if there is any workaround for this problem.

Thanks
IS.

 

[Oleg Starodumov]

Strange, I am having a .Net C++ managed dll project, where in i call a new
on a non managed code. This however is giving a problem,
I get an exception saying "An unhandled exception of type
'System.NullReferenceException' occured in Mydll.dll" "Additional
information: Object reference not set to an instance of an object",

The unmanaged heap is probably corrupted, and the call to new produces
an access violation exception. Try to test the application with PageHeap,
here is more information about it:
http://tinyurl.com/65xhd

Regards,
Oleg

 

[Willy Denoyette [MVP]]

Hi,

Strange, I am having a .Net C++ managed dll project, where in i call a new
on a non managed code. This however is giving a problem,
I get an exception saying "An unhandled exception of type
'System.NullReferenceException' occured in Mydll.dll" "Additional
information: Object reference not set to an instance of an object",

class mycpp
{
}

__gc public class myclass
{
public:
myclass()
{
m_cpp=new m_cpp[10]; // this line gives me the error.
}
private:
mycpp *m_cpp;
}

However i have another test project where i wont get this error. Thats why
i
called it as strange.

Please let me know if there is any workaround for this problem.

Thanks
IS.

Could you post the real code, the snipet you posted doesn't even compile.

m_cpp=new m_cpp[10]; // THIS CANNOT compile

Willy.