installer created by installshield returned error code 1638 - Another version of this

[shiping]

I'm experiencing annoying error message "Another version of this product is already installed. Installation of this version cannot continue. To configure or
remove the existing version of this product, use Add/Remove Programs on the Control Panel" when I launch msi file with version number 2.7.1 after 2.7.0 was already installed on the machine. I'm expecting it provide me option of upgrade rather than "another version installed".

However I don't have any problem when upgrading from version 2.6 to 2.7. Only the third field of version number doesn't work.

[TsungH]

You will want to familiarize yourself with Patching and Upgrades.