DOC: update README_SETUP

README_SETUP.md

@@ -48,13 +48,23 @@ as compiler. We use [cmake](https://cmake.org/download/) as build tool.
    and build the project. (You can open Tools/Command Line/Developer Command
    Prompt and execute `msbuild libcaosdb.sln /property:Configuration=Release`)
 
-## Creating a Local Conan Build ##
+### Creating a Local Conan Build ##
 
 Building and installing libcaosdb with Conan is just a single command:  
 `conan create . -s "compiler.libcxx=libstdc++11"`
 
 For MacOS, you probably should adjust the option as mentioned above.
 
+### Troubleshooting
+
+#### `conan install` Fails Due to Missing Prebuilts
+
+When `conan install` fails during the installation of the dependencies because
+a precompiled package is not available for your specific settings, try adding
+the `--build=missing` option: `conan install .. [ other options
+] --build=missing`. This should download and compile the sources of the
+dependencies.
+
 ## Unit Tests
 
 ### Build