Error signing jar file

Question

I am using oracle Devsuite10g 10.1.2.1 on windows when I signed the webuitl.jar and jacob.jar it gives me the follwing error
E:\dev10g\forms\webutil>sign_webutil.bat e:\dev10g\forms\java\frmwebutil.jar
Generating a self signing certificate for key=webutil...
keytool error: java.lang.Exception: Key pair not generated, alias <webutil> alre
ady exists
There were warnings or errors while generating a self signing certificate. Pleas
e review them.
Backing up e:\dev10g\forms\java\frmwebutil.jar as e:\dev10g\forms\java\frmwebuti l.jar.old...
1 file(s) copied.
Signing e:\dev10g\forms\java\frmwebutil.jar using key=webutil...
The system cannot find the path specified.
There were warnings or errors while signing the jar. Please review them.
E:\dev10g\forms\webutil>sign_webutil.bat e:\dev10g\forms\java\jacob.jar
Generating a self signing certificate for key=webutil...
keytool error: java.lang.Exception: Key pair not generated, alias <webutil> alre
ady exists
There were warnings or errors while generating a self signing certificate. Please review them.
and later check the formweb.cfg
WebUtilArchive=frmwebutil.jar,jacob.jar
WebUtilLogging=off
WebUtilLoggingDetail=normal
WebUtilErrorMode=Alert
WebUtilDispatchMonitorInterval=5
WebUtilTrustInternal=true
WebUtilMaxTransferSize=16384
baseHTMLjinitiator=webutiljini.htm
baseHTMLjpi=webutiljpi.htm
baseHTML=webutilbase.htm
archive_jini=frmall_jinit.jar,frmwebutil.jar,jacob.jar
archive=frmall.jar
lookAndFeel=oracle
and the webutil.cfg is as follows
archive_jini=f90all_jinit.jar,frmwebutil.jar,jacob.jar
WebUtilArchive=frmwebutil.jar,jacob.jar
install.syslin.location=/webutil
transfer.APPSRV.READ=C:\
transfer.APPSRV.WRITE.1=C:\WORK\UPLOAD
transfer.APPSRV.WRITE.2=C:\WORK\LOG
transfer.appsrv.workAreaRoot=d:\temp
transfer.appsrv.accessControl=true
transfer.database.enabled=TRUE
transfer.appsrv.enabled=TRUE
plz help to come out from this error

Answer 1

This occurs when you attempt to run the provided script (batch) more than once or the Key name is already in the keystore. If you are not familiar with how to sign JARs on your own, the easiest solution is likely to change the value of JAR_KEY in the script.
The script is provided as a courtesy more than anything else. Oracle doesn't do any magic in the script. It is simply a scripted version of what is required by Sun in order to create a certificate and sign a JAR. You can get more info about how to sign a JAR file from Sun or by doing a Google search. You can also refer to an older Oracle white paper which offered step-by-step instructions for signing:
http://www.oracle.com/technology/products/forms/pdf/SigningJint13.pdf