*** ERROR : SSO Partner application could not be registered successfully.

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While registring sso is getting failed with below error
+++++++++++++++++++++++++++++++++++++++
BEGIN ORACLE HOME INSTANCE REGISTRATION:
Oracle Home Instance preferences stored successfully.
Oracle Home Instance registered successfully.
BEGIN SSO REGISTRATION:
Beginning to register partner application.
*** ERROR : SSO Partner application could not be registered successfully.
End of /ebstest1/erpapp/appl/fnd/12.0.0/patch/115/bin/txkSetSSOReg.pl : No Errors encountered

Cause
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File contain production entries $IAS_ORACLE_HOME/Apache/Apache/iasobf remove it and try it again.

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Solution
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[apptest1@ctsst11 bin]$ grep -i ap1 iasobf
ORACLE_HOME=/ebsoltp1/erpapp/10.1.3
[apptest1@ctst11 bin]$

Note
++++
If you still face the same issue  register the sso with different name and might it resolve your issue.