Hello Lucian, you're right, but with the new ant version 1.8.0 i got new errors! I tried this on Windows and Red Hat Enterprise Linux 5.4 (also with ant 1.8.0) and i got different errors. I see the problem are the jars. There are so many different files and versions and i do not know which works together. Without a manual it is not possible to use jasperreports as a beginner. It is not a problem to buy the printed book at Amazon, but i read some pages at google books and it didn't help me. Greets Holger