Check for existing file before installation

[Astaroth]

Hi

Is there a way to add a function where the installer checks whether a specific file exists before continuing the installation?

Here's an example:

1. We create a regular application installer. It installs "app.exe" and several other files to a specified folder.
2. We then want to create a DLC package that adds additional files into the installation folder, but requires the previous version to already be installed in the specified folder.
3. The installer checks whether the "app.exe" file already exists in a specified location. If not, it displays a message, something like: "The setup cannot continue because the required files could not be found in the installation folder."

This is to create an offline executable DLC/update package, not the online automatic update like with Visual Update Express.

Thanks

[volki]

There´s no possibility to add any command/function to InstallForge being executed BEFORE installation (with the possibility to stop the installation process properly). At least, I didn´t find any.
We would appreciate such an urgently needed feature very much!
Kindest regards
V.

[gavrieladi]

Did you find a solution for this?
I'm also looking to install Microsoft Visual C++ Redistributable for the user in case they don't have it because my software requires version 2022 to work.
I'd love to hear if you managed to do it?!

[gavrieladi]

Did you find a solution for this?
I'm also looking to install Microsoft Visual C++ Redistributable for the user in case they don't have it because my software requires version 2022 to work.
I'd love to hear if you managed to do it?!

[binet]

Check for existing file before installation. Absolute need this feature if continue installation or not