No records when run inside tomcat. The report preview shows data in Eclipse

Question

<p>I&#39;ve designed a report using Crystal reports for Eclipse. The database server is Oracle. The preview window inside Eclipse shows correctly the report.</p><p>If I run the report using Tomcat . The body is empty and no records are found. The query has no filter. </p><p> This is the code I&#39;m using on Tomcat inside a servlet.</p><p>com.crystaldecisions.reports.sdk.ReportClientDocument reportClientDocument = new com.crystaldecisions.reports.sdk.ReportClientDocument();<br />               String reportName="CrystalReport1.rpt";        try {<br />            reportClientDocument.open(reportName, OpenReportOptions._openAsReadOnly);<br />            <br />            <br />            JRCHelperSample.changeDataSource(reportClientDocument, "COMM", "***", "jdbc:oracle:thin:@localhost:1521:db", "oracle.jdbc.OracleDriver",null );    </p><p>                    reportClientDocument.verifyDatabase();              </p><p>          ByteArrayInputStream byteArrayInputStream = (ByteArrayInputStream)reportClientDocument.getPrintOutputController().export(ReportExportFormat.PDF);                        //Release report.           </p><p> reportClientDocument.close();                    </p><p>                     writeToBrowser(byteArrayInputStream, response, "application/pdf", "A1.pdf"); </p>

Answer 1

<p>In the log it&#39;s written</p><p> Failed to build database query: <strong>there is no required fields.</strong><br />04 ott 2006 12:16:57 [http-8080-Processor24] DEBUG com.crystaldecisions.reports.dataengine.datasource - Reading database record<br />04 ott 2006 12:16:57 [http-8080-Processor24] DEBUG com.crystaldecisions.reports.dataengine.datasource - Reading next recurring database record.<br />04 ott 2006 12:16:57 [http-8080-Processor24] DEBUG com.crystaldecisions.reports.dataengine.datasource - Finished reading database records, no more records <br /></p>