[MonetDB-users] Failed to load Main-Class manifest attribute

I'm trying to run the VOC example, but the jar file does not load: Administrator@LIFEBOOK /cygdrive/c/Program Files/CWI/MonetDB5/share/MonetDB/lib : ls -l total 304 -rwx------+ 1 Administrator None 170548 Jun 13 10:45 jdbcclient-1.6.jar -rwx------+ 1 Administrator None 136449 Jun 13 10:45 monetdb-1.6-jdbc.jar Administrator@LIFEBOOK /cygdrive/c/Program Files/CWI/MonetDB5/share/MonetDB/lib : java -jar monetdb-1.6-jdbc.jar -u voc Failed to load Main-Class manifest attribute from monetdb-1.6-jdbc.jar