-1 error during upload

[gjstarrett]

So my Digisparks just arrived and I am struggling to get them to work. I have followed the starting steps (setting board and programmer to Digispark). When I go to upload the example "Start" I receive the error following this paragraph. I have tested this on all three of my Digisparks and across two computers (Hackintosh desktop running OSX 10.8.2 and 2008 MacBook running OSX 10.6. using the same USB extension cord and directly connecting the Digispark to the computer's USB 2.0 port. I would love to get these working, I'm new to microcontrollers and am excited to learn how to program them. Additionally when I try to upload a sketch on the desktop it does a number on the USB controller (unusual mouse movements, usb drives losing connection, and wireless disconnects) and I usually have to restart the machine.

Binary sketch size: 756 bytes (of a 6,010 byte maximum)
Running Digispark Uploader...
Plug in device now...
Binary sketch size: 756 bytes (of a 6,010 byte maximum)
Running Digispark Uploader...
Plug in device now...
> Please plug in the device ...
Assertion failed: (res >= 4), function micronucleus_connect, file library/micronucleus_lib.c, line 63.
> Press CTRL+C to terminate the program.
> Please plug in the device ...
> Press CTRL+C to terminate the program.
> Device is found!
connecting: 20% complete
connecting: 23% complete
connecting: 27% complete
connecting: 30% complete
connecting: 34% complete
connecting: 40% complete
> Device looks like ATtiny85!
> Available space for user application: 6010 bytes
> Suggested sleep time between sending pages: 8ms
> Whole page count: 94
> Erase function sleep duration: 752ms
parsing: 40% complete
parsing: 60% complete
> Erasing the memory ...
erasing: 60% complete
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>> Abort mission! -1 error has occured ...
>> Please unplug the device and restart the program.

[digistump]

gjstarett - can you try on the Desktop plugged directly into the rear USB ports, making sure to plug it firmly in and not move or wiggle it once plugged in? Let me know how that goes and we\'ll go from there.

Thanks,
Erik

[RussNelson]

I had to plug mine into a powered USB hub. I tried two of the three USB ports on my laptop, tried an unpowered hub, but only a Belkin 7-port powered hub got me joy.