Hello everybody !

I use Win10 Pro v.21H2   and  WinCC v.7.4 SP1 Upd9.

I create a new Single-User Project  → open Graphic Designer → add some graphic object (e.g. a rectangular)  →  “Object Properties” → “Event” Tab  →  want to dynamize the “Mouse Click” with C-action.

Once I press “C-action” text in drop-down menu in “Action” column – everything get stucked. Neither LMC no RMC work in Graphic Designer window, I even can not close the Graphic Designer window. So everything in Graphic Designer window is frozen.

Then I need to close the project (without closing the WinCC Explorer) and open it again. Then Graphic Designer works Ok until I try to create some C-action again.

On another PC with Win10 Pro v.1909  and the same WinCC v.7.4 SP1 Upd9 all C-actions work Ok.

What can be a problem ?

Thanks in Advance.

Here is an answer :

https://support.industry.siemens.com/forum/WW/en/posts/c-editor-doesn-t-open/259806