Hi, I'm getting this error when running apctest in /usr/sbin/, where is apcdevice.c and what is to be done to line 77. 2005-11-15 15:29:59 apctest 3.10.18 (21 July 2005) redhat Checking configuration ... Attached to driver: usb sharenet.type = DISABLE cable.type = USB_CABLE You are using a USB cable type, so I'm entering USB test mode mode.type = USB_UPS Setting up the port ... apctest FATAL ERROR in apcdevice.c at line 77 Unable to create UPS lock file. apctest FATAL ERROR in apcdevice.c at line 77 Unable to create UPS lock file. apctest error termination completed Thanks david