I had some problems launching "whiteboardd", "whiteboard-sib-acces" and "whiteboard-sib-access-nota" programs with the following message:
process 4449: arguments to dbus_connection_set_exit_on_disconnect() were incorrect, assertion "connection != NULL" failed in file dbus-connection.c line 2956.
This is normally a bug in some application using the D-Bus library.
I've solved them by:
shell# eval $(dbus-launch --sh-syntax)
shell# export BUS_SESSION_BUS_ADDRESS
shell# export DBUS_SESSION_BUS_PID
before launching the program.