Hello to everybody: I'm Román, a Spanish Developer with a special case. I'm developing an app which framework requires working with iReport 3.0.0 (I can't use the latest 3.6.2 version). First, I were not able to find documentation about 3.0.0. In addition, I'v tested it with the "very most" simple report I've been able to design: one SELECT, one field, that (unique) field in the details band... and it doen't work. I attach the xml file in case of anybody can help me. I must say I've tested the connection to the database in the datasource definition dialog and the test is successful and I've tested in both MySQL and PostgreSQL (with each JDBC driver). Thank you in advance. Code:<?xml version="1.0" encoding="ISO-8859-1" ?><!-- Created with iReport - A designer for JasperReports --><!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd"><jasperReport name="Test" columnCount="1" printOrder="Vertical" orientation="Portrait" pageWidth="595" pageHeight="842" columnWidth="535" columnSpacing="0" leftMargin="30" rightMargin="30" topMargin="20" bottomMargin="20" whenNoDataType="NoPages" isTitleNewPage="false" isSummaryNewPage="false"> <property name="ireport.scriptlethandling" value="2" /> <property name="ireport.encoding" value="ISO-8859-1" /> <import value="java.util.*" /> <import value="net.sf.jasperreports.engine.*" /> <import value="net.sf.jasperreports.engine.data.*" /> <queryString><![CDATA[select num_reg_ent from eos_amendment;]]></queryString> <field name="num_reg_ent" class="java.lang.Integer"/> <background> <band height="0" isSplitAllowed="true" > </band> </background> <title> <band height="50" isSplitAllowed="true" > </band> </title> <pageHeader> <band height="50" isSplitAllowed="true" > </band> </pageHeader> <columnHeader> <band height="30" isSplitAllowed="true" > </band> </columnHeader> <detail> <band height="100" isSplitAllowed="true" > <textField isStretchWithOverflow="false" isBlankWhenNull="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" > <reportElement x="140" y="74" width="100" height="18" key="textField"/> <box></box> <textElement> <font/> </textElement> <textFieldExpression class="java.lang.Integer"><![CDATA[$F{num_reg_ent}]]></textFieldExpression> </textField> </band> </detail> <columnFooter> <band height="30" isSplitAllowed="true" > </band> </columnFooter> <pageFooter> <band height="50" isSplitAllowed="true" > </band> </pageFooter> <lastPageFooter> <band height="50" isSplitAllowed="true" > </band> </lastPageFooter> <summary> <band height="50" isSplitAllowed="true" > </band> </summary></jasperReport>