It works for me
Try all the combinations
ciao
(modified)
// Project: len
// Start: Monday, April 24, 2017
// IDE Version: 14.497
a$=""
count=220
FOR k=1 TO 20000
FOR i=1 TO count
a$=a$+CHR$(RND(255))
NEXT
IF LEN (a$)<>count
PRINT "error " + LEN (a$),0,100
SHOWSCREEN
MOUSEWAIT
ENDIF
a$=""
NEXT
PRINT "OK",0,100
SHOWSCREEN
SLEEP 1000