You can use Migration Assistant log files and status files to troubleshoot migration failures.

If the migration fails, Migration Assistant generates a log file bundle on your desktop.


  1. Navigate to your desktop folder and open the file, where time-of-migration-attempt displays the year, month, date, hour, minutes, and seconds of the migration attempt.
  2. Retrieve the log files from the .zip file on your desktop.
  3. Retrieve other log files and status files.
    Table 1. Log and status files locations on the source vCenter Server or vCenter Server Single Sign-On
    File Location
    Migration Assistant log file %temp%\migration-assistant.log
    Pre-check log file %temp%\vcsMigration\UpgradeRunner.log
    Pre-check component log files %temp%\vcsMigration\CollectRequirements_ComponentName.log
    Export log file %temp%\vcsMigration\UpgradeRunner.log
    Export component log files %temp%\vcsMigration\Export_ComponentName.log
    Status file %temp%\UpgradeRunnerExportOutput.json
    Table 2. Log and status files locations on the target vCenter Server Appliance or Platform Services Controller
    File Location
    Log files



    Domain join log file /tmp/lwidentity.join.log
    Export log files



    First boot component log files



    Import log files



    Precheck status file /var/log/vmware/upgrade/prechecks.json
    Export status file /var/log/vmware/upgrade/export.json
    First boot status file /var/log/vmware/firstbootStatus.json
    Import status file /var/log/vmware/upgrade/import.json

What to do next

Examine the log files to determine the cause of failure.