diff --git a/Fushigi/course/CourseArea.cs b/Fushigi/course/CourseArea.cs
index abf310ef..d5ce402e 100644
--- a/Fushigi/course/CourseArea.cs
+++ b/Fushigi/course/CourseArea.cs
@@ -134,13 +134,21 @@ public void Save(RSTB resource_table, string folder)
 
             var decomp_size = (uint)mem.Length;
 
-            //Compress and save the course area           
-            string levelPath = Path.Combine(folder, $"{mAreaName}.bcett.byml.zs");
-            File.WriteAllBytes(levelPath, FileUtil.CompressData(mem.ToArray()));
+            try
+            {
+                //Compress and save the course area           
+                string levelPath = Path.Combine(folder, $"{mAreaName}.bcett.byml.zs");
+                File.WriteAllBytes(levelPath, FileUtil.CompressData(mem.ToArray()));
 
-            //Update resource table
-            // filePath is a key not an actual path so we cannot use Path.Combine
-            resource_table.SetResource($"BancMapUnit/{mAreaName}.bcett.byml", decomp_size);
+                //Update resource table
+                // filePath is a key not an actual path so we cannot use Path.Combine
+                resource_table.SetResource($"BancMapUnit/{mAreaName}.bcett.byml", decomp_size);
+            }
+            catch(IOException e)
+            {
+                //Likely due to the course being open in the game, caught to prevent crash
+                //TODO: notify the user
+            }
         }
 
         public string GetName()
diff --git a/Fushigi/rstb/RSTB.cs b/Fushigi/rstb/RSTB.cs
index 79df331f..5e00b4c6 100644
--- a/Fushigi/rstb/RSTB.cs
+++ b/Fushigi/rstb/RSTB.cs
@@ -88,11 +88,19 @@ public void Save()
 
             var mem = new MemoryStream();
             Write(mem);
-            
-            File.WriteAllBytes(
+
+            try
+            {
+                File.WriteAllBytes(
                 Path.Combine(dir, "ResourceSizeTable.Product.100.rsizetable.zs"), 
                 FileUtil.CompressData(mem.ToArray())
                 );
+            }
+            catch (IOException e)
+            {
+                //Likely due to the course being open in the game, caught to prevent crash
+                //TODO: notify the user
+            }
         }
 
         private void Read(Stream stream)