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rendering reports using xep

Submitted by lavinia_fulgeanu on Thu, 01/28/2010 - 08:42.
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hi,
i'm new to java and i need some help regarding some reports. i'm generating pdf reports from xml using xep and weblogic 9.2. from time to time for a column in the report the value NaN is diplayed instead of the actual value. after regenerating the report the column has the correct value. i checked both xml generated for the reports and are the same(same value for that column in each xml. Both times same xsl is used. when the Nan value is display i gett the following exception:

[Error] Context - XEPReportCreator.writeReport
Exception Message - java.lang.ArrayIndexOutOfBoundsException: -1
javax.xml.transform.TransformerException: java.lang.ArrayIndexOutOfBoundsException: -1
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:670)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:300)

Please help.