How To Fix PSB_API_MSGCL018 - Only one project can be loaded at a time

PSB_API_MSGCL018 - Overview

• Message type: E = Error

• Message class: PSB_API_MSGCL -

• Message number: 018

• Message text: Only one project can be loaded at a time

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message PSB_API_MSGCL018 - Only one project can be loaded at a time ?

  The SAP error message PSB_API_MSGCL018 indicates that the system is currently set up to allow only one project to be loaded at a time. This is a common restriction in certain SAP modules, particularly in project management or project system (PS) environments.
  
  Cause:
  The error typically occurs when:
  
  An attempt is made to load multiple projects simultaneously in a context where only one is permitted.
  There may be a session or transaction that is already processing a project, preventing another project from being loaded.
  The system settings or configurations may restrict the loading of multiple projects.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Active Sessions: Ensure that there are no other active sessions or transactions that are currently processing a project. If there are, complete or terminate those sessions before attempting to load a new project.
  
  
  Close Unused Sessions: If you have multiple SAP GUI sessions open, close any that are not needed. This