GO JS Undo Showing Error

GoJS
1

Salaamun Alekum

While I Am Using GOJS Undo Operation Using Command Of My Code

diag.commandHandler.undo();

It Is Showing Me Following Mentioned Error In Console Of Browser

property set error: Error: Picture.element must be an instance of
Image, Canvas, or Video.

And After Using Undo When I Use Redo diag.commandHandler.redo(); Function
Then Nodes Data Array diagram.model.nodeDataArray; Gives Null

Can Anyone Identify What Could Be The Root Cause

Thank You

2

Greetings. And Happy Thanksgiving for those of us who are celebrating that today.

The error message is an error in the Picture.element property setter, which I have fixed in a beta release of 1.5.14: GoJS - Build Interactive Diagrams for the Web. Please try that to see if the error does not occur.

As far as your Model.nodeDataArray being set to null, that is very surprising – I cannot explain that. Maybe it won’t happen once this undo/redo problem is fixed. But if it does, we can look into it if you give us a way to reproduce that problem. Does your code ever set Model.nodeDataArray to any value?

3

Salaamun Alekum
And Greetings And Salutations And May Bless You In This Thanksgiving In Shah Allah [Smile]
Thank You Mr. Walter This Definitely Would Be Helpful
This Was Creating A Serious Issue In Our App We Were Thinking To Implement Our Own Manual Clipboard And Undo Redo Manager Today
I Shall Forward This To Our Seniors In Morning This Good News Will Definitely Resolve All The Issues In Shah Allah
I Am Really Honored And Thankful Of Your For Such A Nice Support And Kindness
Thank You So Much
[Smile]

4

Salaamun Alekum
Thank You Mr. Walter Using Latest Beta Version From http://gojs.net/beta/release/go.js
Did Solved Our Issue Thank You So Much For Your Kind Support

Thank You Mr. Walter And GOJS And NWoods Team
[Smile] Salaam

5

Very nice demo. Thank you for reporting the bug. I am sorry that you had to deal with it.