Thanks.  I checked the makefiles.  The Makefile in the TIDL directory has 
this block
run:
ti-mct-heap-check -c
mjpg_streamer -i "input_opencv.so -r 640x480 --filter 
./classification.tidl.so" -o "output_http.so -p 8090 -w 
/usr/share/mjpg-streamer/www" 2> /dev/null

while the Makefile in ../common has

start:
ifneq ($(PRU_DIR),)
@echo write_init_pins.sh
@$(COMMON)/write_init_pins.sh /lib/firmware/$(CHIP)-pru$(PRUN)-fw
@echo "-    Starting PRU $(PRUN)"
@echo start > $(PRU_DIR)/state
else ifeq ($(PROC),tidl)
ti-mct-heap-check -c
sudo mjpg_streamer -i "input_opencv.so -r 640x480 --filter 
./$(TARGET)$(EXE)" -o "output_http.so -p 8080 -w 
/usr/share/mjpg-streamer/www"
else
./$(TARGET)$(EXE)
endif

Since the error message referenced "start" I changed the port to 8090 to 
match the tidl Makefile.  I got no errors but I didn't get an image on 
MJPGStreamer either.   I don't know if it's my camera but it is there in 
linux

debian@beaglebone:/var/lib/cloud9$ v4l2-ctl --list-devices
TTQ 8MP Camera: TTQ 8MP Camera (usb-xhci-hcd.1.auto-1):
        /dev/video0

thanks

On Saturday, March 21, 2020 at 8:35:53 PM UTC-5, RobertCNelson wrote:
>
> On Sat, Mar 21, 2020 at 8:30 PM Bernard Fischer 
> <[email protected] <javascript:>> wrote: 
> > 
> > When I try to run the "classification" or "dummy" AI examples in Cloud9, 
> I get the following errors 
> > 
> > bind: Address already in use 
> > 
> > bind: Address already in use 
> > 
> > o: server_thread(): bind(8080) failed 
> > 
> > /var/lib/cloud9/common/Makefile:169: recipe for target 'start' failed 
> > 
> > I can't tell what is generating this error, or what the address refers 
> to.  Does it refer to the URL for mjpgstreamer? 
>
> 8080 is user port on nginx, to see /var/www/html/ 
>
> (Cloud9 is proxy'ed thru nginx).. 
>
> @Jason Kridner  is that demo correct with nginx serving traffic on 8080? 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

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