In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJ Allen wrote:

I've been using my SX-Blitz for some time now without problems.
 

Today I was programming and re-programming and then it stopped working.  Now, all I get is a "SX-Key not found on COM1" Dialog Box.

 

My board runs using a 28MHz crystal.  I thought/think that it's OK to leave that all in-circuit when using the SX-Blitz.  Isn't that so?

 

I was just tweaking some values and pushing the Compile and Program buttons, leaving the SX-Blitz in place.  And the fourth go around it failed.  This happened last week and I powered down, removed the Blitz, put it back on, and powered the board back up and it was OK.  But this time it's staying down.

 

The COM1 is OK, checked that.

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