Server certificate verification failed: issuer is not trusted

I am getting below error when running a target of ANT script. Error message saying that "server certificate verification is failed". Please help how to remove this problem. I am working in Windows XP.

C:\apache-ant-1.8.1>ant checkout
Buildfile: C:\Program Files\Java\apache-ant-1.8.1\build.xml

checkout:
[svn] Using command line interface
Svn : Checking out a working copy from a repository :
co -r HEAD https://col.../trunk C:\ant-1.8.1\Test_Checkout 
--username 69 --password *******--non-interactive
svn: PROPFIND request failed on '/svn/asia-pac-financials/trunk'
svn: PROPFIND of '/sv.../trunk': 
Server certificate verification failed: 
issuer is not trusted (https://col....com)

BUILD FAILED
C:\apache-ant-1.8.1\build.xml:16: Can't checkout

Total time: 3 seconds

can you try to run svn checkout once manually to your URL https://yoururl/trunk C:\ant-1.8.1\Test_Checkout using command line and accept certificate.

Or as @AndrewSpear says below

Rather than checking out manually run svn list https://your.repository.url from Terminal (Mac) / Command Line (Win) to get the option to accept the certificate permanently

svn will ask you for confirmation. accept it permanently.

After that this should work for subsequent requests from ant script.

Run "svn help commit" to all available options. You will see that there is one option responsible for accepting server certificates:

--trust-server-cert : accept unknown SSL server certificates without prompting (but only with --non-interactive)

Add it to your svn command arguments and you will not need to run svn manually to accept it permanently.

I wouldn't use:

svn checkout

just to authorizes the server authentication, I rather use:

svn list https://your.repository.url

which will ask you to do the authentication as well.

If this is needed to get authorization to a user that can't login, run:

sudo -u username svn list https://your.repository.url

If you are using svn with Jenkins on a Windows Server, you must accept https certificate using the same Jenkins's Windows service user.
So , if your Jenkins service runs as "MYSERVER\Administrator", you must use this command before all others, only one time of course :

runas /user:MYSERVER\Administrator "svn --username user --password password list https://myserver/svn/REPO "

svn asks you to accept the certificate and stores it in the right path.

After this you'll be able to use svn in jenkins job directly in a Windows batch command step.