The error_handling.lss file I described in a previous post needs to be available on any machine where the script using it will execute. This is due to a weird behavior of the Notes engine when processing the %Include instruction: The inclusion is done at execution time if executing on a client and at compilation time if executing on a server.
It is certainly possible to distribute a file to all the users, explaining in which folder to copy it, but it is much simpler to have the same database that use it to install it whenever needed.
The HelpAbout document is a good place for storing a file. After attaching it, a HideWhen formula will prevent it from showing up to the user. Then a simple (Install error_handling.lss) agent will extract the file to the proper folder (if the folder doesn’t already have one). And the formula @Command( [RunAgent]; "(Install error_handling.lss)" ) in the PostOpen event of the Database Script library will run the agent each time the user opens the database.
Here is the code for the agent: