attiny85 flash errase error

[tdwster]

I am using arduino IDE on ubuntu.  I get this error when uploading a sketch to the attiny85:   

>> Flash erase error -32 has occurred ...

I have not been able to find and info about that.  Any help appreciated ... thanks

[tdwster]

Here is the full text of the IDE output

Sketch uses 718 bytes (11%) of program storage space. Maximum is 6012 bytes.
Global variables use 9 bytes of dynamic memory.
Running Digispark Uploader...
Plug in device now... (will timeout in 60 seconds)
> Please plug in the device ...
> Press CTRL+C to terminate the program.
> Device is found!
connecting: 16% complete
connecting: 22% complete
connecting: 28% complete
connecting: 33% complete
> Device has firmware version 1.6
> Available space for user applications: 6012 bytes
> Suggested sleep time between sending pages: 8ms
> Whole page count: 94  page size: 64
> Erase function sleep duration: 752ms
parsing: 50% complete
> Erasing the memory ...
erasing: 55% complete
erasing: 60% complete
erasing: 65% complete
>> Flash erase error -32 has occured ...
>> Please unplug the device and restart the program.