SAP Knowledge Base Article - Preview

2683412 - ORA-12638: Credential retrieval failed - Data Services


  • Error:  CON-120404: |Data flow df_name OCI call <OCIServerAttach> for connection <(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = hostname )(PORT = NNNN)))(CONNECT_DATA =(SID=SID)))> failed: <ORA-12638: Credential retrieval failed>.
  • Some Oracle sources fail with this error, some Oracle sources work.
  • If the sqlnet.ora file setting SQLNET.AUTHENTICATION_SERVICES= (NTS) is changed to SQLNET.AUTHENTICATION_SERVICES= (NONE), then Oracle database is not accessible.
  • Changing the SQLNET.AUTHENTICATION_SERVICES= (NONE) setting will not fix the issue. 



SAP Data Services


SAP Data Services all versions


ORA, DS, BODS, connection, rights, permissions , KBA , EIM-DS-EXE , Job Execution , EIM-DS , Data Services , Problem

About this page

This is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP for Me (Login required).

Search for additional results

Visit SAP Support Portal's SAP Notes and KBA Search.