Odd error message I have not seen before

Been programming a Teensy 3.2 - all fine.
Switched over to a Pro Mini (programming using a USBASP) and its throwing up this error that I cannot seem to get rid of.
I have SO many issues with connecting to Arduino's on all 3 of my laptops...

avrdude: ser_open(): can't open device "usb:0/140000/0/5": The filename, directory name, or volume label syntax is incorrect.

Don't worry. In a fit of 'had enough' I have solved the problem by binning 16x Pro Minis.
I spend hours trying to get these &^*% things to work and they are just not worth the effort.

Thrown it over to a reliable Teensy. Loaded first time

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