[Elecraft] Odd K-3 Symptom

[Pete Smith N4ZR]

During the WPX CW contest, I was having some trouble with RF getting 
back into my K-3 from my KPA-1500, displaying HI RF warnings and 
magically adjusting my audio gain after each transmission.  Tightening 
ground connections effectively solved  the situation, but during the 
last few hours, I started noticing ERR PTT warnings very briefly after 
each transmission.  I was using N1MM Logger+ to control PTT, and have 
just confirmed that this error only occurs when N1MM is controlling 
PTT.  Any ideas?

-- 
73, Pete N4ZR