Dear Tom,

thank you for your reply.

I have copied the exact error message below:

--- Error Message Begin ---
Exception in thread "main" java.lang.SecurityException: no manifiest section
for
 signature file entry javax/mail/internet/AsciiOutputStream.class
        at sun.security.util.SignatureFileVerifier.verifySection(Unknown
Source)

        at sun.security.util.SignatureFileVerifier.processImpl(Unknown
Source)
        at sun.security.util.SignatureFileVerifier.process(Unknown Source)
        at java.util.jar.JarVerifier.processEntry(Unknown Source)
        at java.util.jar.JarVerifier.update(Unknown Source)
        at java.util.jar.JarFile.initializeVerifier(Unknown Source)
        at java.util.jar.JarFile.getInputStream(Unknown Source)
        at sun.misc.URLClassPath$JarLoader$1.getInputStream(Unknown Source)
        at sun.misc.Resource.cachedInputStream(Unknown Source)
        at sun.misc.Resource.getByteBuffer(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
--- Error Message End ---

The application uses the following jar libraries for mail processing:

        activation.jar
        commons-email-1.0.jar
        mail.jar

I have tried to create the new jar with an empty manifiest file, or to merge
the manifiest files from the jar libraries, but nothing worked.

If it was possible, I would prefer to do it without signatures. I just want
to deploy one single jar file.

The repacking is done with an ant script. This script umpacks all jars in a
temporary folder and repacks it together with the application class files
using the following command:

        <jar jarfile="${basedir}/ship/myApp.jar"
                filesetmanifest="merge">
                
                <fileset dir="${basedir}/cls">
                </fileset>
                        
                <fileset dir="${basedir}/tmp">
                </fileset>
                        
                <manifest>
                        <attribute name="Main-Class"
value="myApp.Application" />
                </manifest>
        </jar>

Any hints are welcome!

Regards
Magnus

Dear Esmond,

does this mean that I have to deploy my application together with the jar
libraries as a bunch of files?

Can't I switch off signature checking somehow?

Thank you,
Magnus