Login Management screen System.ArgumentNullException: Key cannot be null

Hi,
We are following the below technical note to configure BAM:
Tutorial: Oracle BAM Plans to collect data from JMS bus
(Tutorial_2_BAM_Administrator.doc)
Under the section "Creating a BAM user", when trying to create a new user, we noticed that there were two pre-existing entries for the user "aocdom1\aocrac" - one in lowercase and one in uppercase:
aocdom1\aocrac
AOCDOM1\AOCRAC
We did not find the "Delete" option in the Login Management screen. So we clicked on the edit option and deleted the username and full name for the user "aocrac" from the fields and saved the information. Now we are getting the below error whenever we enter into the Login Management screen:
System.ArgumentNullException: Key cannot be null.
Parameter name: key
at System.Collections.Hashtable.ContainsKey(Object key)
at Oracle.BAM.Administrator.ManageLogins.IsUnknownUser(SystemObject soUser, Hashtable& rhtUnknowns)
at Oracle.BAM.Administrator.ManageLogins
The screen is accepting creation of new users though.
Please let us know how to resolve above issue.
Regards,
Balu

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Server stack trace:
at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.EndRequest(IAsyncResult result)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at System.ServiceModel.Channels.IRequestChannel.EndRequest(IAsyncResult result)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.RequestCallback(IAsyncResult result)
MessageId: {A4503B09-51A0-48B7-915C-753100D250A7}
InstanceID: {D8DC8808-41B9-47CC-A790-ACA0963E5BFE
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<ns0:TSA103 xmlns:ns0="http://Microsoft.LobServices.OracleDB/2007/03/BIZTALK/Procedure">
<ns0:P_CITY_FEE_AMT/>
<ns0:P_NO_LOCATIONS_NBR>1</ns0:P_NO_LOCATIONS_NBR>
<ns0:P_STATE_FEE_AMT>12.00</ns0:P_STATE_FEE_AMT>
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<ns0:P_DLN_OCCUR_ID_REGION>0</ns0:P_DLN_OCCUR_ID_REGION>
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Hi Bruce,
Have you configured SOAP Action Header property at WCF-OracleDB send port.
Refer the post->
https://social.msdn.microsoft.com/Forums/en-US/238fdee1-564e-45cc-be96-6215af682b1e/exception-on-outbound-map-with-wcforacledb-adapter-at-send-port-in-biztalk-2010?forum=biztalkr2adapters
For the alternate solution you can also refer the workaround mentioned here ->
Error while inserting NULL value to Oracle database table using BizTalk
Rachit
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Hi
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Did you know, what could be?
I am pasting the log.
TOTAL STEPS 2
1. Convert Data:         completed in 1 sec.
2. Load and Process:     Failed in 1 sec.
3. Import:               completed in 1 sec.
[Selection]
FILE=\GrupoPit\FRATECO\DataManager\DataFiles
41010100001.csv
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Frateco.xls
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Success
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Accept Count : 6
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HI, When I process SOAP call from ABAP using class csoaptransporthttp->request_response, I am getting following error message:
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Key cannot be null error

Hi
When loading data i'm getting the error
Key cannot be null.
Parameter name: key
What does this error mean? I have done this with a large load, then started testing with a small load. But Im still getting the same error.
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TOTAL STEPS 2
1. Convert Data:         completed in 0 sec.
2. LOAD AND PROCESS:     Failed in 0 sec.
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Hi el_ber,
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Login Management screen System.ArgumentNullException: Key cannot be null

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