I am using iReport 5.0.1. I created a date parameter and am using it in my query: When I preview the report, I enter my date parameter: After I enter all the parameters and run the report, I get this error: Error filling print... Error executing SQL statement for : Sample net.sf.jasperreports.engine.JRException: Error executing SQL statement for : Sample at com.jaspersoft.jrx.query.PlSqlQueryExecuter.createDatasource(PlSqlQueryExecuter.java:143) at net.sf.jasperreports.engine.fill.JRFillDataset.createQueryDatasource(JRFillDataset.java:1086) at net.sf.jasperreports.engine.fill.JRFillDataset.initDatasource(JRFillDataset.java:667) at net.sf.jasperreports.engine.fill.JRBaseFiller.setParameters(JRBaseFiller.java:1258) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:877) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:822) at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:61) at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446) at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:276) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:745) at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:891) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near "Feb" at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1592) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1327) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:192) at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254) at com.jaspersoft.jrx.query.PlSqlQueryExecuter.createDatasource(PlSqlQueryExecuter.java:136) ... 12 more Print not filled. Try to use an EmptyDataSource... What is going on here, and how do I fix this? Thanks! Edit: I figured it out. I had to change the $P!{start_date} to $P{start_date}