Class not found exception

[semiosys]

I get a no class def found error, raised by the XLS exporter.

Here is the exception stack:
java.lang.NoClassDefFoundError: org/apache/poi/hssf/util/HSSFColor$WHITE
at net.sf.jasperreports.engine.export.JRXlsExporter.(JRXlsExporter.java:186) ~[jasperreports-6.4.1.jar:6.4.1]
at net.sf.jasperreports.engine.export.JRXlsExporter.(JRXlsExporter.java:206) ~[jasperreports-6.4.1.jar:6.4.1]
at net.sf.dynamicreports.jasper.transformation.ExporterTransform.xls(ExporterTransform.java:703) ~[dynamicreports-core-6.0.0.jar:na]
at net.sf.dynamicreports.jasper.transformation.ExporterTransform.transform(ExporterTransform.java:124) ~[dynamicreports-core-6.0.0.jar:na]
at net.sf.dynamicreports.jasper.builder.JasperReportBuilder.export(JasperReportBuilder.java:895) ~[dynamicreports-core-6.0.0.jar:na]
at net.sf.dynamicreports.jasper.builder.JasperReportBuilder.toXls(JasperReportBuilder.java:807) ~[dynamicreports-core-6.0.0.jar:na]
at com.qse.server.service.reports.AdminCrossTabActivityReport.generateJournal_MONTH_WEEK(AdminCrossTabActivityReport.java:218) ~[classes/:na]

It happens that in my project I have this maven dependency defined :

	<dependency>
		<groupId>org.apache.poi</groupId>
		<artifactId>poi</artifactId>
		<version>4.0.1</version>
	</dependency>

My 2 cents: the exception might be raised because it relies on an older version of poi, some 3.x may be. In the poi 4.0.1, this HSSFColor is defined, but the WHITE color may be defined in a new way ?