AdminUI :: Partnership Certificates : Error creating JSAFE_PrivateKey object - com.rsa.jsafe.JSAFE_InvalidKeyException: Invalid key data length expected 8

Document ID : KB000097096
Last Modified Date : 18/05/2018
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We're running AdminUI, the new certificate you have loaded into
the certificate store doesn't show up certificate is not visible in
combo box to select signing certificate for the entity
(Signing Private Key Alias).

When you reproduce this issue, you see the following error in the
server.log of the AdminUI :

  2018-05-16 12:17:11,028 ERROR [stderr] (default task-18)
  com.netegrity.smkeydatabase.db.SmCertificateDataStoreException: Error
  creating JSAFE_PrivateKey object.

  2018-05-16 12:17:11,138 ERROR [stderr] (default task-18) Caused by:
  com.rsa.jsafe.JSAFE_InvalidKeyException: Invalid key data length,
  expected 8

How can we solve this issue ?
  Policy Server 12.7;
  AdminUI 12.7;
Upgrade the Policy Server, Policy Store, AdminUI and AdminUI Prereq to 12.7SP2 to solve this issue.
You'll benefit from fix from a known issue reporting the same error as 

 "Error creating JSAFE_PrivateKey object"

  Defects Fixed in 12.7.02
  00912269    DE335788    Administrative UI fails to modify SP partnerships.