"Connection to the SLD couldn't be opened successfully"

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Hello There,

I am trying to call my SAP Test System from my WebDynpro Application via RFC Bapi - Call.

This <b>worked fine</b> until last week but then suddenly I can't make any connection to the SLD anymore. The error message in the browser says:

The initial exception that caused the request to fail, was:

com.sap.lcr.api.cimclient.LcrException: com.sap.lcr.api.cimclient.UnauthorizedUserException: User credentials are invalid or user is denied access

at com.sap.lcr.api.sapmodel.SAP_J2EEEngineClusterAccessor.getInstance(SAP_J2EEEngineClusterAccessor.java:99)

at com.sap.lcr.api.sapmodel.SAP_J2EEEngineClusterAccessor.getInstance(SAP_J2EEEngineClusterAccessor.java:78)

at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.readJCODestinationFromSLD(JCOClientConnection.java:520)

at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter(JCOClientConnection.java:454)

at com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.init(AbstractJCOClientConnection.java:248)

<b>My permissions at the sld are fine if I connect directly to the sld...

The SLD / RFC Connection is already configured and it worked fine until last week</b>

Everything worked fine. But then suddenly there was this error coming up. I

Any ideas or help is greatly appreciated and points are awarded!!!

Thanks,

Kiran