Intermittent error in CanvasItem.js

[AndyBell]

Version: "9.0/LGPL Development Only"
Browser: Chrome & IE 9

Hi

I have an application that makes several ToolStrips and adds a DynamicForm to them, as described in the documentation.

Occasionally, after a ToolStrip has been created and then destroyed (by closing the window it is on), subsequent creation of a ToolStrip fails at line 140 of CanvasItem.js because this.canvasItem is undefined.

I have been able to work around this by altering line 140 to test for this.canvasItem being defined, but it does not explain what is causing the problem.

I think that the code that is trying to locate the last created item so as to determine the next Tab position is picking up a partially destroyed item from the previous ToolStrip. Unfortunately, I cannot provide an example as the bug is intermittent. It did not occur in SC 8.x

Any ideas as to what is causing this?

Andy

[Isomorphic]

Please show the line of code you've changed in your workaround

[AndyBell]

Hi

Line 140 now looks like:

if (this.canvasItem)
                this.canvasItem._getCanvasTabDescendents(this, tabStops);

Effectively, this leaves the tabStops array empty and the fucntion returns a zero...