When we are installing ECC6 EHP 2 or above, maybe sometimes we will found error like this

last error reported by the step unable to open rfc connection


Function call raised a program-driven exception CHANGE_NOT_ALLOWED

So, we have to do these :

  1. On the condition, sapinst.exe has been stopped, copy keydb.xml ( on C:\Program Files\sapinst_instdir\ERPEhP5\AS-ABAP\MSS\CENTRAL directory) to keydb.xml – Copy, and then edit the keydb.xml, find “CDATA[ERROR]” inside it, and change it to “CDATA[OK]”, and then save.
  2. Check your virtual memory of the server (Paging file on Windows Server) must above the recommendations.

Hope this help