fork problem

[Ottavio Campana <ottavio campana vi it>]

I'm trying to execute a new program from a gtk application.
When I call fork I've got:

The program 'visualizzatore' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadIDChoice (invalid resource ID chosen for this
connection)'.
  (Details: serial 1039 error_code 14 request_code 55 minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

What's wrong with it?

-- 
Non c'è più forza nella normalità, c'è solo monotonia.