Hello, We are converting xls to csv file using unoconv command, unoconv command start soffice.bin proccess for convert file and it working fine to kill that unoconv + soffice.bin process by timeout command if taken more than time which define with timeout command, But sometime it was not killed soffice.bin process so any idea why this happen?, Which case can occur this issue, Can you please look at this and guide me proper regarding this, As i have mention command + installed pages in my system so that will be help to assist this thing, Let me know if require any further info regarding this *Installed packages :------------------------* Os CentOS-6.4 unoconv 0.5 LibreOffice 4.2.8.2 Libreoffice-headless 4.2.8.2 Python 2.6.6 timeout (GNU coreutils) 8.4 *Command :------------* exec('timeout 300 unoconv -T 10 -vvvvv -f csv -o "destination.xls" "destination.csv" 2>&1', $arrOp, $return_value); Thanks in advance! Regards, - Ken