Installshield Product Code

Copying an old .ism project file to start a new application project clones the Product Code. Always generate a fresh Product Code and Upgrade Code for a brand new application. Troubleshooting Common Product Code Issues "Another version of this product is already installed"

The following is a typical workflow for creating a major upgrade package that can detect and remove a previous version:

Use build scripts to pass new property values dynamically during compile time. Troubleshooting Common Product Code Issues installshield product code

Incorrectly modifying a Product Code can break your application's upgrade path, leading to duplicate installations or orphaned registry keys. Follow these strict deployment rules: Maintain the Product Code when:

If the underlying application identity changes, it requires a unique Product Code. Retrieving the Product Code Programmatically Copying an old

Ensure both the old and new installers share the exact same Upgrade Code . Verify that the Upgrade Table in InstallShield is configured to detect and remove the range of older Product Codes.

| | Upgrade Code | Product Code | |---|---|---| | Changes over product lifetime? | ❌ No | ✅ Yes (major updates) | | Used for | Finding previous versions to upgrade | Identifying current installed instance | | Side-by-side install possible? | No (same Upgrade Code) | Yes (different Product Code) | Verify that the Upgrade Table in InstallShield is

An InstallShield Product Code is a unique identifier used by Windows Installer-based setup packages to represent a specific product. It is a GUID (Globally Unique Identifier) that the Windows Installer and authoring tools like InstallShield use to track installed applications, manage upgrades, detect product presence, and ensure correct maintenance and removal operations.