diff --git a/prepare.sh b/prepare.sh
index cc46803..3a66359 100755
--- a/prepare.sh
+++ b/prepare.sh
@@ -9,6 +9,7 @@ if test -e $ofn".csv" ; then
 	echo "$fae"
 else
 	libreoffice --headless --convert-to csv:"Text - txt - csv (StarCalc)":"59,,76,3,1/1/2/2/2" $if || { echo "errors during export to csv"; exit 3; }
-	tail -n +2 ${ofn}".csv" | cut -d";" -f2,13-17 > ${ofn}".tmp" && mv ${ofn}".tmp" ${ofn}".csv" || { echo "error on removing first line."; exit 6; }
+	tail -n +2 ${ofn}".csv" | cut -d";" -f2,13-17|grep -e "^[v|g|n]" > ${ofn}".tmp"
+	mv ${ofn}".tmp" ${ofn}".csv" || { echo "error on removing first line."; exit 6; }
 fi