Hello, I've run into a similar problem that somebody has reported in April to the list.
My task is to deal with a USB prototype using an OSGi framework (like Oscar, Knopflerfish). I use the javax-usb 0.10.2, javax-usb-ri 0.10.2 and javax-usb-ri-linux 0.10.5 packages. See below the exception. Any help appreciated... This occurs SOMETIMES when I DISCONNECT the device from cable. My program first traverses the USB tree to find all devices, then listens and handles events, delivered by a UsbServicesListener. Thank you. Kind regards-------------Szabolcs Exception in thread "javax.usb Linux implementation Topology Poller" [stderr] java.lang.NullPointerException [stderr] at org.knopflerfish.framework.BundleClassLoader.loadOwnClass(BundleClassLoader.java :291) [stderr] at org.knopflerfish.framework.BundleClassLoader.findClass(BundleClassLoader.java:13 6) [stderr] at org.knopflerfish.framework.BundleClassLoader.loadClass(BundleClassLoader.java:22 4) [stderr] at java.lang.ClassLoader.loadClass(ClassLoader.java:251) [stderr] at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) [stderr] at com.ibm.jusb.UsbDeviceImp.disconnect(UsbDeviceImp.java:344) [stderr] at com.ibm.jusb.os.linux.LinuxUsbServices.updateTopology(LinuxUsbServices.java:200) [stderr] at com.ibm.jusb.os.linux.LinuxUsbServices.access$000(LinuxUsbServices.java:26) [stderr] at com.ibm.jusb.os.linux.LinuxUsbServices$1.run(LinuxUsbServices.java:120) [stderr] at java.lang.Thread.run(Thread.java:595) PS.: Enabling the line com.ibm.jusb.os.linux.LinuxUsbServices.trace_data = true in javax.usb.properties won't list more messages than before, what do I wrong? ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. Get your fingers limbered up and give it your best shot. 4 great events, 4 opportunities to win big! Highest score wins.NEC IT Guy Games. Play to win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 _______________________________________________ javax-usb-devel mailing list javax-usb-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
