i am repeatedley getting an error in visual studio, mostly when i have 2 components and join them together with an arrow. This happens bothe wheh i do it with a mouse (during testing) and programatically. the error i get is the following:

An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll

Additional information: Object reference not set to an instance of an object.

I know the error is not direcly related to flowchart.NET as it appears to be in the system.windows.forms.dll. I also tried to trace the error in the disassambler and it seems to be located here:

0000000b  cmp         dword ptr [ecx],ecx

Address: System.Windows.Forms.ToolTip.GetHandleCreated

The error does not occur when i build the solution in debug mode and run it outside of visual studio. However when i build the application in release mode and run it outside VS it still occurs.

any tips pls

I got a stack trace in a messagebox, but cannot select its text to paste it in the forum.

i will have to send you the image by mail if that is ok.

Do you call any form or control methods from other threads?

could you email us the release .exe file ?

actually i disabled the db part and it works....

I filtered the error to be happening when saving the properties of the arrow object in an object oriented database, namly DB4o.

the thing is that the code snippet is within a try/catch block and its not getting detected.

anyway... for now i disabled the function and the program works fine.

10x