Here are some pretty useful tips straight from the Exchange Setup Test Team for using the Exchange Setup Log to troubleshoot Exchange Setup issues.
Tip #1: Most of the errors in the Setup Log are...
Updated Jul 01, 2019
Version 2.0
Blog Post
If you can ignore all the stale Cheezy Poofs lying on the floor of his office you'll find that Eric Cartman from South Park actually is a pretty decent developer.
But seriously, Cartman is the in-house name for the setup manager program that Exchange uses. Cartman was developed by the Back Office team to handle the installation of multiple applications through just one interface. As one customer put it, "It's a Setup to run setups." The idea was allow the customer to run a single Setup that would install a bunch of apps (also known as a "suite"). This way they only had to enter one Product Key, agree to one End User License Agreement, could do all their prereq checking at the same time, and Cartman would manage any cross app dependencies (you can't install Office before installing the operating system). This is also why you see the Exchange components in a tree structure in the setup UI; the other braches would be other apps with their sub-components.
So what does this have to do with that entry in the log? Well, in order to integrate into Cartman, Exchange Setup has to use the Cartman provided UI. Some UI pages we show, some we modify at runtime to hide unused text fields and buttons, some we suppress. When you choose to install an Exchange component, Setup is actually installing a bunch of components under the covers, some of which Cartman would expect us to show a UI page. However Exchange Setup might not need that page shown so we have to tell Cartman to ignore the request. That's pretty much what you're seeing there in the log.
But seriously, Cartman is the in-house name for the setup manager program that Exchange uses. Cartman was developed by the Back Office team to handle the installation of multiple applications through just one interface. As one customer put it, "It's a Setup to run setups." The idea was allow the customer to run a single Setup that would install a bunch of apps (also known as a "suite"). This way they only had to enter one Product Key, agree to one End User License Agreement, could do all their prereq checking at the same time, and Cartman would manage any cross app dependencies (you can't install Office before installing the operating system). This is also why you see the Exchange components in a tree structure in the setup UI; the other braches would be other apps with their sub-components.
So what does this have to do with that entry in the log? Well, in order to integrate into Cartman, Exchange Setup has to use the Cartman provided UI. Some UI pages we show, some we modify at runtime to hide unused text fields and buttons, some we suppress. When you choose to install an Exchange component, Setup is actually installing a bunch of components under the covers, some of which Cartman would expect us to show a UI page. However Exchange Setup might not need that page shown so we have to tell Cartman to ignore the request. That's pretty much what you're seeing there in the log.