WebApp Linux 64bits - Failed to link objects


I’m working on the 2016r1 release of Xojo on a 64bits Windows PC.
I have several WebApps that i deploy on an Ubuntu 12.04 server.
I can compile all my webApps on Linux 64bits except one :
When i compile it, i get this message :

Error: [984A873B]\Linux_x86_64\/#main.o: [984A873B]\Linux_x86_64\/#main.bc:function $BuildDate%o%o: undefined reference to `DC)connexion8._Instance.20’

Has anyone an idea about how to fix it ?