Summary

When building a Basic MSI project Build Error -7155 occurs

Symptoms

When building a Basic MSI project , the following error may occur:

Error -7155: Upgrade item with Action Property ISFOUNDNEWERPRODUCTVERSION conflicted with another item and has been dropped. This may result in conditions referencing property ISFOUNDNEWERPRODUCTVERSION to behave incorrectly.

Cause

This error occurs when you don?t have an Upgrade Code associated with your project.

Resolution

To resolve this issue you need to repopulate the Upgrade Code field.

1. Go to the 'General Information' view under "Installation Information"
2. Find the 'Upgrade Code' field
3. Click the 'Generate a new GUID' button that is located on the far right hand side of the "Upgrade Code" field

This will generate you a new "Upgrade code". There is never a reason to remove the "Upgrade Code" and generally there are only a few reasons to change the "Upgrade code". The "Upgrade code" uniquely identifies the product and all the related versions of that product during upgrades.