diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduListenerSaver.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduListenerSaver.java
index 2c7c6a144e43f29b9dc169e0bdc3907c84452a32..2f858a3caa605d22df041c86e9be022c04c6ad49 100644
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduListenerSaver.java
+++ b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduListenerSaver.java
@@ -77,7 +77,7 @@ public class FetterolfPduListenerSaver {
                 }
             }
             System.out.println("Ending pdu save to " + recorder.getLogFile());
-        } catch (IOException ex) {
+        } catch (Exception ex) {
             System.err.println("*** Exception: " + ex.getClass().getSimpleName() + ": " + ex.getLocalizedMessage());
         }
     }
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduReceiver.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduReceiver.java
index cf2f1e99151d6d5ff92d80e6ec8b24e39e834cff..703d3cc725ee1fb1c893d1d382300d5544481648 100644
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduReceiver.java
+++ b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduReceiver.java
@@ -3,7 +3,7 @@ package MV3500Cohort2019JulySeptember.homework4.Fetterolf;
 import java.net.*;
 import java.io.*;
 
-import edu.nps.moves.dis7.*;
+import edu.nps.moves.dis7.pdus.*;
 import edu.nps.moves.dis7.enumerations.*;
 import edu.nps.moves.dis7.utilities.*;
 import java.util.ArrayList;
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduSender.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduSender.java
index af97291ed05ce19edf6172e52853261111f64bd2..cf4d9649f8bbdb49fac1d05f759ef68a4c6ea939 100755
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduSender.java
+++ b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Fetterolf/FetterolfPduSender.java
@@ -4,7 +4,7 @@ import java.io.*;
 import java.net.*;
 import java.util.*;
 
-import edu.nps.moves.dis7.*;
+import edu.nps.moves.dis7.pdus.*;
 import edu.nps.moves.dis7.enumerations.*;
 
 /**
@@ -104,7 +104,7 @@ public class FetterolfPduSender {
                             // see Garrett Loffelman and Pete Severson's code for OpenDis version 4 example
                             // https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/tree/master/assignments/src/MV3500Cohort2018JulySeptember/projects/LoeffelmanSeverson
                             CommentPdu newCommentPdu = new CommentPdu();
-                            ArrayList<VariableDatum> payloadList = new ArrayList<VariableDatum>();
+                            ArrayList<VariableDatum> payloadList = new ArrayList<>();
 
                             ArrayList<String> commentsList = new ArrayList<>();
                             commentsList.add("Hello CommentPDU");
@@ -117,7 +117,7 @@ public class FetterolfPduSender {
                             for (String comment : commentsList) {
                                 VariableDatum newVariableDatum = new VariableDatum();
                                 newVariableDatum.setVariableDatumValue(comment.getBytes());        // conversion
-                                newVariableDatum.setVariableDatumLength(comment.getBytes().length * 8); // bits, not bytes, see spec and javadoc
+                                newVariableDatum.setVariableDatumLengthInBits(comment.getBytes().length * 8); // bits, not bytes, see spec and javadoc
                                 // alternatively, you do not need to set this and the marshaller will figure it out from the byte array
                                 // (see javadoc for VariableDatum.setVariableDatumLength())
                                 payloadList.add(newVariableDatum);