Could you provide additional information?
- Are you installing on an RPi, Computer or Virtual Machine?
- What operating system are you using?
- Which command is causing the error?
- What directory are you executing the command?
We have seen similar issues when using Virtualenv or Anaconda. Could you try to uninstall the NCSDK using the uninstall.sh script and re-install? If possible, try to install on a fresh machine.