title: Why srt file size and program output file(.prn) size is different ? - PROGRESS 4GL
body: <p>I have written a program which caused srn file size increased in tmp folder and at certain point of time I got SYSTEM ERROR: I/O due to out of disk space( The srn file deleted automatically). So I have asked a team to increase the size from 14 GB to 19 GB in order to fix the system error.</p>
  <p>After that I executed the same program in my home path and the output file is generated (Size is only 5GB) and then connection aborted. I am not sure how. Could somebody explain me what actually is happening while writing to srn file and output file and why the file size was different?</p>