One of my prerequisites is a URL Prerequisite wich open an url for the installation. The problem is that when I try to reinstall, Advanced Installer doesn't recognized that the program is already installed.
Is the prerequisite added from our predefined list of prerequisites or is it added manually by yourself?
If you have added it manually, then this might happen due to prerequisite conditions. If you go to "Prerequisites" page --> your prerequisite --> "Install Conditions" tab --> under "Install Conditions" section, there you should have some conditions set. Basically, how this works:
- before the prerequisite is installed, the setup checks for that condition. In this case, the condition (or conditions) must be false and this will result in the prerequisite being installed.
- after the prerequisite is installed, the setup checks for that condition again. In this case, the condition (or conditions) must be true and this will mean that the prerequisite was correctly installed.
Based on our first point, during a reinstallation, if we do not want the prerequisite to be installed, then that condition must be true. With that being said, please make sure that the condition is true during the reinstallation.