This error may happen when a bundle is importing a package from the standard runtime library (different from java.*) and you need specify that from the bundle manifest.
Example:
Import-Package: org.osgi.framework, sun.misc
It needs to be substituted by:
Import-Package: org.osgi.framework, sun.misc; resolution:=optional
CyberGarage seems not to be very stable in systems that has the IPv6 stack implemented. The result is that in recent distributions of linux (i.e. Ubuntu) the control point is not able to detect devices properly.
A possible solution for that is to stablish the property.
UPnP.setEnable(UPnP.USE_ONLY_IPV4_ADDR);
So that CyberGarage will not try to use IPv6 by default.
Just after the creation of the ControlPoint object is a good place where to put this instruction.
UPDATE!: In linux, it might be necessary to dissable ipv6 completely by editing the file:
/etc/modprobe.d/aliases
and modifying the line
alias net-pf-10 ipv6
for
alias net-pf-10 off
[UPDATED!]
As a temporary solution in Ubuntu 9.10 you can type
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6