Okay, fixed it myself.
I added a PAUSE 10 as shown.
But I surely do not know why the fix worked!
Code:. . . READ 254,PFLAG ' Get state of memory protection IF PFLAG=1 THEN GOTO NXTEST ' If "on", skip mode select PAUSE 10 ' CHECK FOR "STRAPPED" INPUT FOR INDEXW=1 TO 500 ' Test for TRIGGER status at startup CTLIGHT=1 : ALIGHT2=1 ' Indicators are HIGH during the test . . .
Bookmarks