"The Soap RPC call can't be unmarshalled" - during IBM ODM 8.9.2.1 cluster creation

I saw this: -

...

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
        at java.lang.reflect.Method.invoke(Method.java:508)
        at com.ibm.wsspi.bootstrap.WSLauncher.launchMain(WSLauncher.java:234)
        at com.ibm.wsspi.bootstrap.WSLauncher.main(WSLauncher.java:96)
        at com.ibm.wsspi.bootstrap.WSLauncher.run(WSLauncher.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
        at java.lang.reflect.Method.invoke(Method.java:508)
        at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethodWithException(EclipseAppContainer.java:587)
        at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:198)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
        at java.lang.reflect.Method.invoke(Method.java:508)
        at org.eclipse.core.launcher.Main.invokeFramework(Main.java:340)
        at org.eclipse.core.launcher.Main.basicRun(Main.java:282)
        at org.eclipse.core.launcher.Main.run(Main.java:981)
        at com.ibm.wsspi.bootstrap.WSPreLauncher.launchEclipse(WSPreLauncher.java:411)
        at com.ibm.wsspi.bootstrap.WSPreLauncher.main(WSPreLauncher.java:173)
Caused by: java.lang.reflect.UndeclaredThrowableException
        at com.sun.proxy.$Proxy3.getAttribute(Unknown Source)
        at com.ibm.ws.management.AdminClientImpl.getAttribute(AdminClientImpl.java:153)
        at com.ibm.ws.scripting.CommonScriptingObject.connectToAdminService(CommonScriptingObject.java:130)
        at com.ibm.ws.scripting.CommonScriptingObject.<init>(CommonScriptingObject.java:104)
        at com.ibm.ws.scripting.AdminControlClient.<init>(AdminControlClient.java:170)
        at com.ibm.ws.scripting.AbstractShell.createControlClient(AbstractShell.java:1289)
        at com.ibm.ws.scripting.AbstractShell.run(AbstractShell.java:2245)
        at com.ibm.ws.scripting.WasxShell.main(WasxShell.java:1172)
        ... 26 more
Caused by: [SOAPException: faultCode=SOAP-ENV:ServerException; msg=The Soap RPC call can&apos;t be unmarshalled.]
…

and: -

…

[30/10/18 19:49:53:173 GMT] 000000c3 LTPAServerObj E   SECJ0369E: Authentication failed when using LTPA. The exception is com.ibm.websphere.wim.exception.PasswordCheckFailedException: CWWIM4513E  The password match failed for the 'wasadmin' principal name..
...

whilst creating an ODM Decision Center cluster: -

/opt/ibm/WebSphere/AppServer/profiles/Dmgr01/bin/createODMDecisionCenterCluster.sh -adminUsername wasadmin -adminPassword passw0rd -clusterPropertiesFile /opt/ibm/WebSphere/AppServer/profiles/Dmgr01/bin/odm/ODMDecisionCenterCluster.properties

I knew that the credentials that I was using were A-OK: -

/opt/ibm/WebSphere/AppServer/profiles/Dmgr01/bin/wsadmin.sh -lang jython -username wasadmin -password passw0rd

…

WASX7209I: Connected to process "dmgr" on node Dmgr using SOAP connector;  The type of process is: DeploymentManager
WASX7031I: For help, enter: "print Help.help()"
…

Thankfully we have this: -

RS03063: USERNAME AND PASSWORD ARE NOT PASSED CORRECTLY IN THE CREATEODMDECISIONCENTERCLUSTER.SH SCRIPT

and I established that APAR RS03063 is shipped via a fix pack to the ODM Profile Templates: -

Operational Decision Manager - Profile Template for Decision Center V8.9.2.1

Once I downloaded and installed this, all was well.

NB I did have to drop/recreate the WAS profiles etc. so it was a bit of a "nuke n' pave"