ERROR IN VISUAL STUDIO PROGRAMMING WHILE ACCESING PLANES OF INVENTOR PART

[ashish.patilSP94R]

An unhandled exception of type 'System.NullReferenceException' occurred in InventorDrawingGenerator.exe

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

[JelteDeJong]

I wrote a bit of test code. The line that throws an error in your code works fine for me.

A "NullReferenceException" means that one of the variables in the line is not set correctly. In this specific line of code, there are not that many variables. Therefore I expect that the "sheetMetalCompDef" variable is not set. You can check this by adding a check for a null reference before this line. something like this.

if (sheetMetalCompDef == null)
{
    // sheetMetalCompDef is not set. 
    // You have a problem in your code before this line.
    Debugger.Break();
}

PlanarSketch baseSketch = sheetMetalCompDef.Sketches.Add(sheetMetalCompDef.WorkPlanes[3]);

 If the "sheetMetalCompDef" variable is not set then the debugger will stop on line 5.

If you have confirmed that this is the issue then you probably want to solve the issue. With that, I can't help without looking at more code.

[ashish.patilSP94R]

I got your debugger point but to access the work-plane what command (code) need to use.

because even after trying multiple times not getting correct 

[JelteDeJong]

If the debugger stops at that point you have a problem in a part of your code that I can not see. Therefore I can't help you. Maybe you can share the complete function.

[ashish.patilSP94R]

thanks for reply where I need to share function so that you can access? @JelteDeJong