Resolution:
Issue:
The "ws.scs.SCSException: SCS Authentication failed" exceptions are seen while integrating SVN with RMS Webstudio project. The exception occurs when a user account does not have permissions to access the selected SVN resource or when providing invalid authentication credentials.

Error Message :
2015 Jul 29 14:01:19:741 GMT -5 GMHITS4041M32.int.asurion.com Error [$default.be.mt$.Worker.0] - [WebStudio.Core.RuleFunctions.Utils.WS_RF_ValidateSCSCredentials] [WS-Inference-cla
ss] Exception validating SCS credentials - java.lang.RuntimeException: com.tibco.be.ws.scs.SCSException: SCS Authentication failed
com.tibco.cep.runtime.model.exception.impl.BEExceptionImpl: java.lang.RuntimeException: com.tibco.be.ws.scs.SCSException: SCS Authentication failed
        at com.tibco.be.ws.functions.WebstudioServerSCSFunctions.listManagedProjects(SourceFile:99)
        at be.gen.WebStudio.Core.RuleFunctions.Utils.booleanWS_RF_ValidateSCSCredentialsStringString$.WS_RF_ValidateSCSCredentials(booleanWS_RF_ValidateSCSCredentialsStringString$.java:19)
        at be.gen.WebStudio.Core.Rules.WS_R_UpdateUserPreferences$WS_R_UpdateUserPreferences_a.execute(WS_R_UpdateUserPreferences.java:150)
        at com.tibco.cep.kernel.core.rete.ReteWM.resolveConflict(SourceFile:330)
        at com.tibco.cep.kernel.core.rete.ReteWM$7.doTxnWork(SourceFile:1494)
        at com.tibco.cep.kernel.core.rete.BeTransaction.run(SourceFile:141)
        at com.tibco.cep.kernel.core.rete.BeTransaction.execute(SourceFile:101)
        at com.tibco.cep.kernel.core.rete.ReteWM.executeRules(SourceFile:1400)
        at com.tibco.cep.runtime.session.impl.RuleSessionImpl$1.doTxnWork(RuleSessionImpl.java:755)
        at com.tibco.cep.kernel.core.rete.BeTransaction.run(SourceFile:156)
        at com.tibco.cep.kernel.core.rete.BeTransaction.execute(SourceFile:101)
        at com.tibco.cep.runtime.session.impl.RuleSessionImpl.invokeFunction(RuleSessionImpl.java:738)
        at com.tibco.cep.runtime.session.impl.RuleSessionImpl.invokeFunction(RuleSessionImpl.java:723)
        at com.tibco.cep.runtime.session.impl.RuleSessionImpl.invokeFunction(RuleSessionImpl.java:719)
        at com.tibco.cep.driver.http.server.impl.servlet.PageFlowServlet$RuleFunctionExecTask.run(SourceFile:425)
        at com.tibco.cep.runtime.session.BEManagedThread.execute(BEManagedThread.java:457)
        at com.tibco.cep.runtime.session.BEManagedThread.run_from_queue(BEManagedThread.java:397)
        at com.tibco.cep.runtime.session.BEManagedThread.run(BEManagedThread.java:294)
Caused by: com.tibco.cep.runtime.model.exception.impl.BEExceptionImpl: com.tibco.be.ws.scs.SCSException: SCS Authentication failed
        at com.tibco.be.ws.scs.impl.svn.DefaultSVNIntegration.a(SourceFile:792)
        at com.tibco.be.ws.scs.impl.svn.DefaultSVNIntegration.listManagedProjects(SourceFile:152)
        at com.tibco.be.ws.functions.WebstudioServerSCSFunctions.listManagedProjects(SourceFile:97)


Resolution:
The following are the properties need to be configured in RMS.cdd to integrate SVN.

                <property name="ws.scs.rootURL" type="string" value="https://svn.app.prod.net/"/>
                <property name="ws.scs.impl.type" type="string" value="svn"/>
                <property name="ws.scs.repo.dir" type="string" value="C:/tibco/be/5.1/rms/repo"/>
                <property name="ws.scs.command.path" type="string" value="C:\Program Files\TortoiseSVN\bin\svn.exe"/>
                <property name="ws.scs.default.username" type="string" value="admin"/>
                <property name="ws.scs.default.password" type="string" value=""/>---------->  password should be in base 64 format.
        
Note : The property ws.scs.command.path should have an absolute path to the SVN command-line client. RMS server uses the SVN command-line tool to connect to the SVN repository. By default, while installing SVN the command-line tool (svn.exe) is disabled. The user should enable the command line tool during SVN installation in order to avoid this error.

Exceptions seen while integrating SVN with RMS (Rules Management Server) Web studio.

SVN documentation