strange NullPointer at JasperFillManager.fillRepor

[gabrielesh]

When I start my JReport,

i have a strange NullPointerException.

5 days ago my report complete successful.

What's is the possible problem?

 

Here is my code:

HashMap parm = new HashMap();

JasperPrint jasperPrint = JasperFillManager.fillReport(reportName, parm, conn);

 

 

Here is the exception

java.lang.NullPointerException

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.lang.Throwable.<init>(Throwable.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.lang.Throwable.<init>(Throwable.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.lang.NullPointerException.<init>(NullPointerException.java:63)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at org.apache.commons.collections.SequencedHashMap.put(Unknown Source)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at org.apache.commons.collections.SequencedHashMap.readExternal(Unknown Source)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputObject(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.readObject(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:555)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputObject(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.readObject(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:555)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputObject(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.readObject(ObjectInputStream.java)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2319)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:555)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1459)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at java.io.ObjectInputStream.readObject(ObjectInputStream.java:272)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:85)

[27/11/06 16.44.50:531 CET] 43794379 SystemErr R at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:515)