yep,, just tracked it down here,,,
it would trip the error on this line of code: SERTXD ("DOW HEX= ",DOW," DOW NUM= ",#DOW,CR,LF) ,,,,, day of week was 3,
checked the settings on the terminal and found:
SETTINGS,
SPECIAL CONTROL CODE FUNCTIONS,
CLOSE SERIAL TERMINALON ETX [03]
close serial terminal on EXT[03] checked
unchecked and seems to work fine now.
sorry for all this,, just thought it was a bug and I should let someone know.
again, apologies!