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Unable to execute jar following stack trace.

Jigar Naik
Ranch Hand

Joined: Dec 12, 2006
Posts: 761

i'm using jasper report for generating report.

following is my java class for displaying report,

i have created jar(JR.jar) file

the entry of MANIFEST.MF

when i double click on JR.jar file it gives me the following error

I have tested the Jr.jar file with following command and got the following stack trace

i'm also bundeling all the requeired jar file in my JR.jar file

I'm using JBoss Eclipse IDE 1.6, Jasper Assist for creating jasper report.

and i have tried to create jar file from dos as well as IDE but getting the same error.

can anybody help me out ???

Jigar Naik

Maurizio Nagni
Ranch Hand

Joined: May 29, 2004
Posts: 75
You cannot include jars in a jar. The classloaders will not find classes inside of multiple jars.
To do this, you'll need to write ( or find) a custom classloader or better add classes to your JAR File's Classpath according to
Paul Sturrock

Joined: Apr 14, 2004
Posts: 10336

Not an advanced question. Moving...

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Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 15092

Also make sure that your manifest file ends with an empty line, otherwise the last line in the manifest file will not be parsed correctly.

See this page, which says:

"Warning: The text file from which you are creating the manifest must end with a new line or carriage return. The last line will not be parsed properly if it does not end with a new line or carriage return."

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I agree. Here's the link:
subject: Unable to execute jar following stack trace.
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