Sorry you can close this ticket... My mistake. Thanks Ethan. I was playing with filters and realized this. I could work with lines if I did the following: plot "inputdata.txt" using 1:($5 > 0 ? $5 : 0.00001) title "read (kBps)" axis x1y1 ls 1 with lines, \ "inputdata.txt" using 1:($8 > 0 ? $8 : 0.00001) title "write (kBps)" axis x1y1 ls 1 with lines, \ "inputdata.txt' using 1:10 title "% Busy" axis x1y2 with lines I assume 5.2.2 essentially did this and when >> 5.2.2 came out it no longer respected...
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