The Symbol button simply "calls" an external application. The "Character map" window can be hidden somewhere, under the ArchiCAD Windows/palettes. Or almost out of the screen.
Or the application can be missing or corrupted in your system.
Check the Application Bar (or Task Manager) to be sure it is running.
_________________
--Roberto Corona-- www.archiradar.com
AC18 - ITA full on Win10
_________________
_________________
I am very happy for your answer.
You are right. It has something to do with system.
I had the same problem several years ago and I solved.
But I forget what I have done.
At that time I have done something in system.
I have no solution for you.
Maybe someone else has some suggestion, but you did not say if the CharMap application works, outside ArchiCAD.
I did a quick search in the Windows register, to see if there is someting easy to fix... with no luck.
_________________
--Roberto Corona-- www.archiradar.com
AC18 - ITA full on Win10
_________________
_________________
Thank you.
You have helped already.
The problem war chart map. I have deleted this file (why I don't know...).
I have reinstalled this one from Window XP CD, since that time it goes well.