Error: "Another version of this product is already installed"
You fixed a typo in a text file. You rebuild the MSI. Do not change the Product Code. You can just overwrite the old file.
Understanding the InstallShield Product Code: The Ultimate Guide installshield product code
In InstallShield Professional or Premier:
Reference this in your main project. This allows you to change the code once for all build configurations. Error: "Another version of this product is already
: Changes where the product version increases, but the architectural changes are small enough that a full uninstall is not required. Change the Product Code For:
// Get product code at runtime szProductCode = MsiGetProductCode(MY_PRODUCT_NAME); formatted with braces and hyphens
A Product Code is a string representation of a GUID, formatted with braces and hyphens, such as 12345678-ABCD-1234-ABCD-123456789ABC .