src/main/java/nl/andrewlalis/Main.java

@@ -44,6 +44,7 @@ public class Main {
         executor.registerCommand("list_errors", new ListErrors());
         executor.registerCommand("delete_repos", new DeleteRepos());
         executor.registerCommand("delegate_student_teams", new DelegateStudentTeams(app));
+        executor.registerCommand("setup_student_repos", new SetupStudentRepos());
 
         logger.info("GithubManager for Github Repositories in Educational Organizations.\n" +
                 "© Andrew Lalis (2018), All rights reserved.\n" +

src/main/java/nl/andrewlalis/model/Student.java

@@ -1,13 +1,23 @@
 package nl.andrewlalis.model;
 
+import nl.andrewlalis.model.error.Error;
+import nl.andrewlalis.model.error.Severity;
+import nl.andrewlalis.ui.view.InitializerApp;
+
 import java.util.List;
 import java.util.Map;
+import java.util.logging.Logger;
 
 /**
  * Represents one student's github information.
  */
 public class Student extends Person {
 
+    private static final Logger logger = Logger.getLogger(Student.class.getName());
+    static {
+        logger.setParent(Logger.getGlobal());
+    }
+
     /**
      * A list of partners that the student has said that they would like to be partners with.
      */
@@ -39,8 +49,13 @@ public class Student extends Person {
     public StudentTeam getPreferredTeam(Map<Integer, Student> studentMap) {
         StudentTeam t = new StudentTeam();
         for (int partnerNumber : this.getPreferredPartners()) {
+            if (!studentMap.containsKey(partnerNumber)) {
+                InitializerApp.organization.addError(new Error(Severity.MEDIUM, "Student " + this.getNumber() + " has non-existent preferred partner with id: " + partnerNumber));
+                logger.warning("Student has non-existent partner id: " + partnerNumber + '\n' + this);
+            } else {
                 t.addMember(studentMap.get(partnerNumber));
             }
+        }
         t.addMember(this);
         return t;
     }

src/main/java/nl/andrewlalis/ui/control/listeners/ReadStudentsFileListener.java

@@ -44,7 +44,7 @@ public class ReadStudentsFileListener extends ExecutableListener {
             String teamSizeString = JOptionPane.showInputDialog(this.app, "Enter the student team size.", "Team Size", JOptionPane.QUESTION_MESSAGE);
             if (teamSizeString != null) {
                 this.executor.executeCommand("read_students", new String[]{
-                        chooser.getSelectedFile().getName(),
+                        chooser.getSelectedFile().getAbsolutePath(),
                         teamSizeString
                 });
             }

src/main/java/nl/andrewlalis/util/FileUtils.java

@@ -54,6 +54,7 @@ public class FileUtils {
             return studentTeams;
         } catch (IOException | ArrayIndexOutOfBoundsException e) {
             logger.severe("Unable to generate studentTeams from CSV file, exiting. " + e.getMessage());
+            e.printStackTrace();
             return null;
         }
     }

src/main/java/nl/andrewlalis/util/TeamGenerator.java

@@ -155,6 +155,10 @@ public class TeamGenerator {
                 }
             }
             Student s = new Student(Integer.parseInt(record.get(3)), record.get(2), record.get(1), record.get(4), preferredIds);
+            if (studentMap.containsValue(s)) {
+                InitializerApp.organization.addError(new Error(Severity.HIGH, "Duplicate entries for student:\n" + s + "\nSince records are in chronological order, this more recent duplicate will override the previous value."));
+                logger.warning("Duplicate entry found for student: " + s + "\nOverwriting previous value.");
+            }
             studentMap.put(s.getNumber(), s);
         }
         logger.fine("Read " + studentMap.size() + " students from records.");