Message: The program is already running. Running two or more simultaneous sessions is not recommended.

Reference Number: KB-02962
Last Modified: July 15, 2024

The information in this article applies to:

Chief Architect Premier or Chief Architect InteriorsHome Designer Professional or Home Designer Architectural or Home Designer Suite


I am having trouble launching my Chief Architect or Home Designer program, where the following warning displays:

  • "Warning #272032433 - The program is already running. Running two or more simultaneous sessions is not recommended."

How can I resolve this warning?


This warning message can display on a Microsoft Windows system when your Chief Architect or Home Designer program appears to be closed, but is still running in the background. Even if you don't visually see the program on screen or in your Windows taskbar, your operating system still shows it is running in order for you to receive this warning.

To resolve the error, please follow the steps below.

  • First, wait a few moments, then attempt to launch the software again.

    If you've just closed your Chief Architect or Home Designer program, and you received this message upon reopening, then the application may be working on writing files. 

  • If waiting a few moments does not display the Chief Architect or Home Designer program, then you may need to stop/end the program using Task Manager.

    On your keyboard, press Ctrl + Shift + Esc to display the Task Manager. Click on More Details at the bottom and then attempt to locate your Chief Architect or Home Designer program within the Processes tab. The program may be located in the "Apps" and/or "Background processes" section, so be sure to thoroughly search through all of the entries for anything that pertains to your program. If one or more entries relating to the program are found, click on the name to highlight the entry, then click End Task.

    Selecting Chief Architect and choosing End Task

  • If you continue to receive the warning, then you may need to shut down the computer completely and restart.

  • If you continue to encounter the warning after restarting, it may indicate a permissions problem with being able to launch the program. If this is the case, shut the computer down completely once more, then reboot it. Once your operating system has restarted, right-click on the program's desktop icon and choose to Run as Administrator. If prompted to allow changes, click Yes. Once the program is able to be launched successfully, close it and attempt to open it normally.

  • If you continue to experience this behavior after following the steps above, please submit a case to our Technical Support team using the Technical Support Center. Please include the program's Message Log and your computer's System Information file. Instructions on locating these files, as well as how to use the Technical Support Center can be found in the Related Articles section.