General error: Can't lock file (errno: -1)

Hi, When I run my application I get java.sql.SQLException: General error: Can't lock file (errno: -1) at org.gjt.mm.mysql.MysqlIO.sendCommand(MysqlIO.java) at org.gjt.mm.mysql.MysqlIO.sqlQueryDirect(MysqlIO.java) at org.gjt.mm.mysql.Connection.execSQL(Connection.java)

ORDER BY on a column of type FLOAT

Hi, I'm trying to do a select in a table an want to get the result ordered by a column 8col2) of type FLOAT. select col1,col2 from table where col1='vvv' ORDER BY col2; It does not work. Is this supposed to work and if so how should I do it. /Pelle