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#725341
if [ ! -e $DATOS/modes/$PREFIJO ];
then echo -n "Error: Mode $PREFIJO does not exist";
c=$(find $DATOS/modes|wc -l)
if((c <= 1));
then echo ".";
else echo ". Try one of:";
for i in $DATOS/modes/*;
do echo " " $(basename $i);
done;
fi
exit 1;
fi