diff --git a/src/context/file_access_interface.rs b/src/context/file_access_interface.rs
index ff8d9e3..a31c020 100644
--- a/src/context/file_access_interface.rs
+++ b/src/context/file_access_interface.rs
@@ -1,15 +1,14 @@
 use std::fmt::Debug;
-use std::path::Path;
 
 pub trait FileAccessInterface: Debug {
-    fn read_file(&self, path: &dyn AsRef<Path>) -> Result<String, Box<dyn std::error::Error>>;
+    fn read_file(&self, path: &str) -> Result<String, std::io::Error>;
 }
 
 #[derive(Debug, Clone)]
 pub struct LocalFileAccessInterface;
 
 impl FileAccessInterface for LocalFileAccessInterface {
-    fn read_file(&self, path: &dyn AsRef<Path>) -> Result<String, Box<dyn std::error::Error>> {
+    fn read_file(&self, path: &str) -> Result<String, std::io::Error> {
         Ok(std::fs::read_to_string(path)?)
     }
 }
diff --git a/src/error/error.rs b/src/error/error.rs
index ef61469..5a620f0 100644
--- a/src/error/error.rs
+++ b/src/error/error.rs
@@ -5,13 +5,14 @@ use nom::IResult;
 pub type Res<T, U> = IResult<T, U, CustomError<T>>;
 
 // TODO: MyError probably shouldn't be based on the same type as the input type since it's used exclusively with static strings right now.
-#[derive(Debug, PartialEq)]
+#[derive(Debug)]
 pub enum CustomError<I> {
     MyError(MyError<I>),
     Nom(I, ErrorKind),
+    IO(std::io::Error),
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Debug)]
 pub struct MyError<I>(pub I);
 
 impl<I> ParseError<I> for CustomError<I> {
@@ -24,3 +25,9 @@ impl<I> ParseError<I> for CustomError<I> {
         other
     }
 }
+
+impl<I> From<std::io::Error> for CustomError<I> {
+    fn from(value: std::io::Error) -> Self {
+        CustomError::IO(value)
+    }
+}
diff --git a/src/parser/document.rs b/src/parser/document.rs
index 4e7084d..6e03cc9 100644
--- a/src/parser/document.rs
+++ b/src/parser/document.rs
@@ -33,6 +33,7 @@ use crate::context::ExitMatcherNode;
 use crate::context::GlobalSettings;
 use crate::context::List;
 use crate::context::RefContext;
+use crate::error::CustomError;
 use crate::error::Res;
 use crate::parser::comment::comment;
 use crate::parser::element_parser::element;
@@ -82,6 +83,12 @@ fn document_org_source<'b, 'g, 'r, 's>(
     let setup_file = scan_for_setup_file(input);
     if setup_file.is_ok() {
         let (_remaining, setup_file) = setup_file.expect("If-statement proves this is okay.");
+        let setup_file_contents = context
+            .get_global_settings()
+            .file_access
+            .read_file(Into::<&str>::into(setup_file))
+            .map_err(|err| nom::Err::<CustomError<OrgSource<'_>>>::Failure(err.into()))?;
+
         println!("TODO: Process setup_file: {}", setup_file);
     }
     let (remaining, document) =
diff --git a/src/parser/org_source.rs b/src/parser/org_source.rs
index dc2bf0c..87f93da 100644
--- a/src/parser/org_source.rs
+++ b/src/parser/org_source.rs
@@ -318,6 +318,7 @@ impl<'s> From<CustomError<OrgSource<'s>>> for CustomError<&'s str> {
         match value {
             CustomError::MyError(err) => CustomError::MyError(err.into()),
             CustomError::Nom(input, error_kind) => CustomError::Nom(input.into(), error_kind),
+            CustomError::IO(err) => CustomError::IO(err),
         }
     }
 }