1. Locate the Agent MSI log

1. Go to:

C:\Users\<AccountRunningTheInstall>\AppData\Local\Temp\

2. Find the log file:

FlexNet Inventory Agent.msi.log

3. Open the log and search for ***Related***. You will see an entry similar to:

InstallShield 9:07:10: Checking related product {73B0D833-3897-4DBD-87D3-3BDD9DE29323}

InstallShield 9:07:10: FlexNet Inventory Agent {73B0D833-3897-4DBD-87D3-3BDD9DE29323} 1033 ***Related***

MSI (c) (DC!24) [09:07:10:779]: PROPERTY CHANGE: Adding IS_MAJOR_UPGRADE property. Its value is 'Yes'.

4. Note the GUID from the log.
• In this example: 73B0D833-3897-4DBD-87D3-3BDD9DE29323

2. Remove the stale GUID(s) using MsiZap

This article includes an attached executable file (msizap.zip, developed by Microsoft) that helps remove stale GUIDs. Download and extract msizap.zip.

1. Open Command Prompt as an administrator.
2. Run the following command:

MsiZap.exe TW {73B0D833-3897-4DBD-87D3-3BDD9DE29323}

• Replace the GUID with the one identified from your agent.msi.log.
3. Repeat this step for each GUID found in the log.

After removing the stale GUID(s), re-run the agent installation.

• If the installation still fails, check the log for additional GUIDs, remove them using MsiZap, and retry.