How to Enable MSI Verbose Logging

Version 3

    Verified Product Versions

    Endpoint Manager 9.5Endpoint Manager 9.6Endpoint Manager 2016.x

    Start Registry Editor (Regedt32.exe), and then create the following path and keys in the registry: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer


    Reg_SZ: Logging

    Value: voicewarmup



    The letters in the value field are the options that are available to use with Windows Installer logging. You can use the options in any order. Each option turns on a specific logging mode. For MSI version 1.1, the function of each option is as follows :


    v - Verbose output

    o - Out-of-disk-space messages

    i - Status messages

    c - Initial UI parameters

    e - All error messages

    w - Non-fatal warnings

    a - Start up of actions

    r - Action-specific records

    m - Out-of-memory or fatal exit information

    u - User requests

    p - Terminal properties

    + - Append to existing file

    ! - Flush each line to the log


    • - Wildcard, to log all information except for the v option. To include the v option, specify *v. It is recommended that you use this service only for troubleshooting. Leaving the service turned on creates a new Msi*.log file every time you use the Add/Remove Programs tool in Control Panel. This activity adversely affects system performance and disk space.



    The file name of the new log varies, but the file name begins with the letters "Msi" and ends with a .log extension. To find the location of the new log in the Temp folder, type cd %temp% at a command prompt, and then press ENTER. Sort on the File Date and the new log should come to the top.