# Ver 3.7 stable? **URL:** \ **Category:** GNU Radio\ **Created:** [June 7, 2014, 6:07pm UTC](https://www.ruby-forum.com/t/ver-3-7-stable/230269 "2014-06-07T18:07:06Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Post date:** [June 7, 2014, 6:07pm UTC](https://www.ruby-forum.com/t/ver-3-7-stable/230269/1 "2014-06-07T18:07:06Z")
Dear experts, (1) Introduction I am Mamoru Y. from Kyoto Univ. Some may know that I am doing satellite-beacon experiment by using USRP1 + GNU Radio. We call the receiver as GRBR (GNU Radio Beacon Receiver). [http://www.rish.kyoto-u.ac.jp/digitalbeacon/](http://www.rish.kyoto-u.ac.jp/digitalbeacon/) Sorry this web site is very old. Now I am using USRP1 + uhd + GNU Radio from python script Also I am using Ubuntu 12.04LTS. My application is a very simple dual-channel receiver recording IQ time-series on two files. The system is VERY stable and useful. I like it very much. (2) Current situation Now I try to move to Ver 3.7. (I installed the software by “build-gnuradio script”.) Necessary small changes for me were – “optfir.low\_pass” location change – “freq\_xlating\_fir\_filter\_ccf” location change & centerfrequency setting from negative to positive – “file\_sink” location change (3) Questions These changes were done. I now start running the system, but have problems. I have 2 questions. Q1: I run the modified code with Ubuntu-32bit 12.04LTS. My code worked for several times, but after that, it created only “0-byte” files (=immediate stop), and then no files were created. I checked the uhd status, and found that “uhd\_find\_devices” was successful while “uhd\_usrp\_probe” failed (see below). I now connect USRP1 to USB3 port. Is this wrong? Q2: I also tried to use the same V3.7 code with Ubuntu-64bit 12.04LTS. But output file from my code is always 0-bytes (=immediate stop). Please tell me if 64bit OS is useless. === Check after the problem (Q1) === beacon@Beacon-36:~/beaconRX$ uhd\_find\_devices linux; GNU C++ version 4.6.3; Boost\_104800; UHD\_003.007.001-72-g383061d8 * * * ## – UHD Device 0 Device Address: type: usrp1 name: serial: 2R24X5U1 beacon@Beacon-36:~/beaconRX$ uhd\_usrp\_probe linux; GNU C++ version 4.6.3; Boost\_104800; UHD\_003.007.001-72-g383061d8 – Opening a USRP1 device… Error: RuntimeError: usb rx6 submit failed: LIBUSB\_ERROR\_IO ============================== Thanks for your help and suggestions. – Mamoru Y. / RISH, Kyoto University removed\_email\_address@domain.invalid Phone +81-774-38-3814, Cell +81-90-5653-7555 ---
**Author:** ![Mamoru\_Y](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ecb155/32.png) [@Mamoru\_Y](https://www.ruby-forum.com/u/Mamoru_Y)\ **Post date:** [June 10, 2014, 2:08pm UTC](https://www.ruby-forum.com/t/ver-3-7-stable/230269/2 "2014-06-10T14:08:08Z")
On 06/07/2014 06:05 PM, Mamoru Y. wrote: > Q1: I run the modified code with Ubuntu-32bit 12.04LTS. My code worked > for several times, but after that, it created only “0-byte” files > (=immediate stop), and then no files were created. I checked the uhd > status, and found that “uhd\_find\_devices” was successful while > “uhd\_usrp\_probe” failed (see below). I now connect USRP1 to USB3 port. > Is this wrong? It’s not wrong, but it doesn’t help you with anything. Does it work on the USB2 port? > Q2: I also tried to use the same V3.7 code with Ubuntu-64bit 12.04LTS. > But output file from my code is always 0-bytes (=immediate stop). > Please tell me if 64bit OS is useless. No, it’s not. Are you sure this is not connected to the USB error? M ---
**Author:** ![Mamoru\_Y](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ecb155/32.png) [@Mamoru\_Y](https://www.ruby-forum.com/u/Mamoru_Y)\ **Post date:** [June 11, 2014, 9:34pm UTC](https://www.ruby-forum.com/t/ver-3-7-stable/230269/3 "2014-06-11T21:34:00Z")
Thanks friends, \ Thank you for all suggestions. They are very helpful. I am continuing the long-run test. Until now the failure occurred only one time (that was my report). After that the system is working fine for several days. Now I connect my USRP1 to USB2 port, and it is working fine with 32-bit Ubuntu. Thanks for your suggestions. The reported failure occurred with USB3 port. I can avoid it. I am sorry I do not pursue the 64-bit Ubuntu issue. Mamoru Y. (2014/06/08 1:05), Mamoru Y. wrote: > [http://www.rish.kyoto-u.ac.jp/digitalbeacon/](http://www.rish.kyoto-u.ac.jp/digitalbeacon/) > Necessary small changes for me were > for several times, but after that, it created only “0-byte” files > beacon@Beacon-36:~/beaconRX$ uhd\_find\_devices > > beacon@Beacon-36:~/beaconRX$ uhd\_usrp\_probe > linux; GNU C++ version 4.6.3; Boost\_104800; UHD\_003.007.001-72-g383061d8 > > – Opening a USRP1 device… > Error: RuntimeError: usb rx6 submit failed: LIBUSB\_ERROR\_IO > > ============================== > > Thanks for your help and suggestions. – Mamoru Y. / RISH, Kyoto University [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Phone +81-774-38-3814, Cell +81-90-5653-7555 ---
**Author:** ![Mamoru\_Y](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ecb155/32.png) [@Mamoru\_Y](https://www.ruby-forum.com/u/Mamoru_Y)\ **Post date:** [June 10, 2014, 2:27pm UTC](https://www.ruby-forum.com/t/ver-3-7-stable/230269/4 "2014-06-10T14:27:39Z")
On 06/07/2014 06:05 PM, Mamoru Y. wrote: > Dear experts, Mamoru, in this case, the GNU Radio mailing list would have been better. You can also cross-post (i.e. post to both mailing lists at once), so we know you did this, and don’t answer twice (as was the case here). I hope our responses have been helpful! Martin