Cannot load the main model file 'xxx.gorm'

Hi

When I try to launch some apps i get the following message :

2006-10-31 [...] Cannot load the main model file 'ProjectCenter.gorm'
... and nothing else, but the program is still running.

ProjectCenter and GSTest fail. More simple examples run fine 
(Calculator,BrowserTest...) and Gorm is ok.

gdnc is running.
  I cant find any path error (but im a newbie...)
    Any idea ?

I use base-1.13.0 back-0.10.3 gui-0.10.3 gorm-1.0.8 under mingw32/XP
GNUStep is installed under C:/GNUstep

Thanks for your help

Xavier