Sounds you have to enhance your code by the following logic

• in your loop, split your $data[$i] into an array containing words
• write the line to a new array if not all of the columns 2, 3 and 4 are zero
• after your for-loop, delete the file
• if the new array contains entries, write them to the file (you actually recreate the file that way)

HTH, Rata

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