Error: "ORA-12528: TNS:listener: all appropriate instances are blocking new connections" When Connecting To The P6 Project or Methodology Management Database

(Doc ID 914099.1)

Last updated on FEBRUARY 12, 2018

Applies to:

Primavera P6 Enterprise Project Portfolio Management - Version 7.0 and later
Primavera P6 Professional Project Management - Version 7.0 and later
Primavera Contract Management - Version 12.0 and later
All Platforms


When logging into P6 Project Management or Methodology Management or establishing a new connection to the database, the following connection failure occurs: 

This can most commonly occur on a Windows operating system, using an Oracle XE, 10g or 11g database.




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