Not sure what was going on

There are several possibilities, but the most important lesson to learn from this is always record your error messages. Error messages are your friends.

Three common errors beginners make on Windows:
1. Failing to save their script edits.
2. Saving to the wrong folder, i.e. running a different version of the script to the one they are editing.
3. Failing to refresh Windows Explorer. Your script may have actually worked first time, but if you checked with a GUI it might not have given an up-to-date view.

In reply to Re^3: Creating new folders by cdarke
in thread Creating new folders by Eagle_f91

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