9. Troubleshooting

The following shows some of the most frequently seen errors and their solutions for quick reference. For other issues that happened during the installation, upgrading or later usage, you may seek Technical support by submitting a bug report to PicoScenes Issues Tracker.

Q: I have successfully installed the PicoScenes software, however, I always encounter “[Warning] Incompatible kernel version, current version: XXX, expected version: YYY.” problem.

A: This is because your system loads the Incompatible kernel. Solution: reboot your computer and choose the expected kernel version YYY in grub menu. If your computer doesn’t show the grub boot selection menu, you may refer to https://askubuntu.com/questions/16042/how-to-get-to-the-grub-menu-at-boot-time/16049#16049 to restore the menu.

Q: I encounter an error during apt installation saying, “E: fail to fetch XXX, File has unexpected size (xxx != xxx). …”

A: The possible reason is that the PicoScenes repository is updated, but your local apt cache is not synced. To fix this error, you should run sudo apt update to sync your local apt cache. If you still encounter this problem, you may seek Technical support.

Q: I encounter an error during USRP B200 series installation, “Could not find the image ‘usrp_b200_fw.hex’ in the image directory /usr/share/uhd/images ….”

A: run sudo /usr/lib/uhd/utils/uhd_images_downloader.py to download all USRP images.