Asynchronous reserve finally failed: missing name server configuration

Hi,
can anybody give me a hint why we get these errors?
"asynchronous reserveFinally failed: missing name server configuration, no logon known -> operation will be retried name reservation : name server=http://sapcoe01.bbn.hp.com:50000/,  category=SAP_DevelopmentComponentName, name=hp.com/appl/tax, reservationKey=63415681, state=FINALIZE_PENDING"
The development objects are listed in SLD with status PRERES. The Name Server location is configured in DTR with the logon data. The name server is also listed in the development configuration.
Where else could be the cause for this error?
Many thanks for any hints!

Hi Martin,
Here you can see the *_PENDING items: http://<host>:50000/dtr/sysconfig/support/NameReservationList
And here you can configure the name server: http://<host>:50000/dtr/system-tools/administration/NameServerConfiguration
The solution is to define your name server a second time with a slightly different URL. The first entry you already defined probably uses the fully qualified hostname, e.g. <i>http://<host>.mycompany.com:50000/sld/cimom</i>. Define the same name server again but <b>without the domain</b> and <b>without the /sld/cimom path</b>, e.g. <i>http://<host>:50000/</i>. Actually it should correspond to what's shown in the error message, e.g. "operation will be retried name reservation : name server=<b>http://<host>:50000/</b>,". When you click Save Configuration, the pending items in the queue will be processed. The only problem we have left is that "after some time" the 2nd entry we just defined dissapears and we need to configure it again (and again and again...)
Kind regards,
Sigiswald

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         at oracle.sysman.emSDK.conf.TargetInstaller.main(TargetInstaller.java:3669)
    Target[oracle_calendar_ocal,ocsapp.lf-ocs1.lima_e_falcao.inet_Calendar Server] already present in /u01/oracle/product/10.1.2/ocs_2/sysman/emd/targets.xml
    Warning: ocad.conf already included in /u01/oracle/product/10.1.2/ocs_2/Apache/Apache/conf/oracle_apache.conf.
    Error: java.io.IOException: /u01/oracle/product/10.1.2/ocs_2/jdk/bin/java returned 1: Registration of ocal_targets.xml into targets.xml failed.unistart: Oracle Calendar Server 10.1.2.0.0
    unistart: Copyright (c) 1993, 2005, Oracle.
    unistart: All rights reserved.
    unistart:
    unistart: opmnctl: opmn is already running
    unistart: opmnctl: starting opmn managed processes...
    unistart: The Calendar Server started successfully.
    Orclguest account has already been provisioned for Calendar.
    Fatal Exception caught : java.lang.NullPointerExceptionopmnctl: stopping opmn managed processes...
    Configuration assistant "Calendar Server Configuration Assistant" failed
    ================================================================================================================
    Someone can help me?
    Thanks a lot.

    is it a reinstallation or a first one on a bare server ? if there were several attempts please be sure you cleaned evrything before launching the installation :
    - product directory
    - /etc/ora*
    - database
    - oraInventory
    - /tmp (I had a similar issue with remaining files in /tmp, even after rebooting)
    If it doesn't work, check that you don't hit the NO-EXCUTE problem (see the OCS 10.1.2 release notes, look for "noexec")

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