lucianc wrote: Could you post relevant JRXML and Java bean class fragments (i.e. field declarations, etc), or, even better, a full self-contained sample that replicates this? Regards, Lucian Hello Lucian, the following attached files. The attribute that generates the error is "aVista" which is part of the attribute "valorAVista." Thanks! [file name=files-68830888a3932bfefaed4e83dc198f37.zip size=2496] Post edited by: thiagoalgo, at: 2008/03/20 12:30