2352112 - Enterprise Manager is offline in Infrastructure Preparation due to error 'com.sap.smd.introscope.em.IntroscopeException: http status code 404' - SAP Solution Manager 7.1 and 7.2

• Error "http status code 404" in the defaultTrace.rfc file of the SAP Solution Manager JAVA stack
• The full error is:

"Error accessing to Enterprise Manager: <HostName>@6001
[EXCEPTION]
com.sap.smd.introscope.em.IntroscopeException: http status code 404
at com.sap.smd.introscope.em.rest.IntroscopeHttpConnection.executeQuery(IntroscopeHttpConnection.java:153)
at com.sap.smd.introscope.em.PooledConnection.executeQuery(PooledConnection.java:26)
at com.sap.smd.introscope.em.rest.EmRestGateway.performStatusQuery(EmRestGateway.java:80)
at com.sap.smd.introscope.em.rest.EmRestGateway.test(EmRestGateway.java:45)
at com.sap.sup.admin.wily.jdbc.EMInfo.test(EMInfo.java:373)
at com.sap.sup.admin.setup.methods.GetEMDescriptionWSMethod.getEMStatus(GetEMDescriptionWSMethod.java:240)
at com.sap.sup.admin.setup.methods.GetEMDescriptionWSMethod.calculateStatusForEMID(GetEMDescriptionWSMethod.java:176)
at com.sap.sup.admin.setup.util.EMStatusCacheRunner.run(EMStatusCacheRunner.java:116)
at com.sap.smd.server.exec.TaskRunner.run(TaskRunner.java:47)
at com.sap.smd.server.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:785)
at java.lang.Thread.run(Thread.java:836)"

• Status of Introscope Enterprise Manager status is red (offline) in the Infrastructure Preparation step. However, the Introscope Enterprise Manager process is up and running correctly at OS level.

, KBA , SV-SMG-DIA-WLY-EMS , Enterprise Manager Setup , Problem