# Problems installing UHD on USRPE100 **URL:** \ **Category:** GNU Radio\ **Created:** [January 24, 2011, 4:52pm UTC](https://www.ruby-forum.com/t/problems-installing-uhd-on-usrpe100/202213 "2011-01-24T16:52:13Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [January 24, 2011, 4:52pm UTC](https://www.ruby-forum.com/t/problems-installing-uhd-on-usrpe100/202213/1 "2011-01-24T16:52:13Z")
I have followed the instruction for installing UHD from source to USRP E100. I have also installed the latest images (as of 1/22/2011). the benchmark\_rx\_rate command gives me the following (see attachement at the end of the email.) I am worried about the warning and also about all the errors i get. ANy help will be greatly appreciated. Thanks Achilleas ====================== usrp-e1xx:/home/anastas/uhd/host/build/examples# ./benchmark\_rx\_rate Exception in static block load\_modules basic\_string::\_S\_construct NULL not valid linux; GNU C++ version 4.5.2 20101204 (prerelease); Boost\_104100; UHD\_002.20110121200648.0173a51 Creating the usrp device with: … Opening USRP-E on /dev/usrp\_e0 Loading FPGA image: /usr/share/uhd/images/usrp\_e100\_fpga.bin… done = 1 File name - /usr/share/uhd/images/usrp\_e100\_fpga.bin Configuration complete. re-Opening USRP-E on /dev/usrp\_e0 Using Device: Single USRP: Device: usrp-e device Mboard: usrp-e mboard RX DSP: usrp-e ddc0 RX Channel: 0 RX Dboard: usrp-e dboard (rx unit) RX Subdev: XCVR2450 (0x0061) TX DSP: usrp-e duc0 TX Channel: 0 TX Dboard: usrp-e dboard (tx unit) TX Subdev: XCVR2450 (0x0060) Testing receive rate 0.500000 Msps (10.000000 second run) Error (usrp-e recv pirate loop): bad vrt header or invalid packet length Metadata missing time spec, exit test… Testing receive rate 1.000000 Msps (10.000000 second run) OMetadata missing time spec, exit test… Testing receive rate 2.000000 Msps (10.000000 second run) Metadata missing time spec, exit test… Testing receive rate 4.000000 Msps (10.000000 second run) Error code: 1 Unexpected error on recv, exit test… Testing receive rate 8.000000 Msps (10.000000 second run) Error code: 1 Unexpected error on recv, exit test… Testing receive rate 16.000000 Msps (10.000000 second run) Error code: 1 Unexpected error on recv, exit test… Testing receive rate 32.000000 Msps (10.000000 second run) Error code: 1 Unexpected error on recv, exit test… Testing receive rate 64.000000 Msps (10.000000 second run) Error code: 1 Unexpected error on recv, exit test… Warning: The hardware does not support the requested RX sample rate: Target sample rate: 128.000000 MSps Actual sample rate: 64.000000 MSps # Done! ---
**Author:** ![Achilleas\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/74df32/32.png) [@Achilleas\_A](https://www.ruby-forum.com/u/Achilleas_A)\ **Post date:** [January 24, 2011, 11:57pm UTC](https://www.ruby-forum.com/t/problems-installing-uhd-on-usrpe100/202213/2 "2011-01-24T23:57:02Z")
Ok, i can repeat this problem. If you use the latest 0001\* image and change USRP\_E\_COMPAT\_NUM to 0x02 in usrp\_e100\_impl.hpp, it should be fine. [http://www.ettus.com/downloads/uhd\_images/UHD-images-0001.20101214004901.3ed60b6/](http://www.ettus.com/downloads/uhd_images/UHD-images-0001.20101214004901.3ed60b6/) Figuring it out, \_josh On 01/24/2011 07:39 AM, Achilleas A. wrote: > ANy help will be greatly appreciated. > > Thanks > Achilleas > > ====================== > usrp-e1xx:/home/anastas/uhd/host/build/examples# ./benchmark\_rx\_rate > Exception in static block load\_modules > basic\_string::\_S\_construct NULL not valid this one is ok, the stuff after is unrelated and a problem