[Resolved] prosv5 Command Failed

Lately, several macOS users of PROS have been experiencing the following error:

Error: Command failed: prosv5 --machine-output --version
dyld: Library not loaded: @executable_path/../.Python
Referenced from: /usr/local/Cellar/pros-cli/3.1.4/libexec/bin/python3.7
Reason: image not found

This is a critical issue because it prevents ANY prosv5 command from being run. Luckily, it can be resolved. After some trial and error, I was able to fix this issue. Your python version and macOS version should not really matter in this case. Here are the following steps I followed.

Check your homebrew install

  1. run brew doctor: address any warnings until it returns: Your system is ready to brew.
  2. run brew cleanup this should take care of itself automatically

Note: I caution you to be careful as you fix the brew warnings. Know what a command does before you run it.

Reinstall PROS by following these exact steps

  1. Save any PROS projects and close any editor windows.
  2. run brew tap osx-cross/arm && brew install arm-gcc-bin
  3. run brew tap purduesigbots/pros
  4. run brew cask reinstall pros-editor
  5. run brew reinstall pros-cli (Potentially optional, but still a good idea to run)

Note: These commands are from the PROS website: homebrew directions. You can read what each one does there.

Once you restart your terminal and reopen PROS the issue should be resolved.
You can test if everything is working by running prosv5 in any terminal window.
Expected output:

Usage: pros [OPTIONS] COMMAND [ARGS]...

  --version  Displays version and exits
  --help     Show this message and exit.

Standard Options:
  --debug                         Enable debugging output
  --verbose                       Enable verbose output
                                  Logging level
  --logfile <PATH CHOICE>...      Log messages to a file

  conductor  Perform project management for PROS
  lsusb      List plugged in VEX Devices
  make       Build current PROS project or cwd
  terminal   Open a terminal to a serial port There are...
  upgrade    Check for updates to the PROS CLI
  upload     Upload a binary to a microcontroller.
  v5         Utilities for managing the VEX V5

Hopefully this helps!


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