How to use esri/undomanager and "myModules/customoperation",becasue it is not working

[sridharGanta]

Dear tea,,

I have tried many times but undo manager not working please help me.

Regards,

Sridhar G

[TyroneBiggums]

Can you post some code or a sample link? Or, you could compare your code with this example: Shapes and Symbols