Usermenu does sometimes not find subroutine
 

Problem:
I Have a custom menu which works ok, when I start (code is called when the
wb is opened)
However, when I activated it once, the follsing times excel responds with
"Excel cannot find the associated Macro Module1.BuildGraph"
The code of the called sub is in the same Module1.
I'm using Exc2002

Thanks
Ernst