diff --git a/src/main.d b/src/main.d
index e528f58a..eed7d551 100644
--- a/src/main.d
+++ b/src/main.d
@@ -120,7 +120,7 @@ int main(string[] args)
 			log.vlog("[M] Directory created: ", path);
 			try {
 				sync.scanForDifferences(path);
-			} catch(SyncException e) {
+			} catch(Exception e) {
 				log.log(e.msg);
 			}
 		};
@@ -128,7 +128,7 @@ int main(string[] args)
 			log.vlog("[M] File changed: ", path);
 			try {
 				sync.scanForDifferences(path);
-			} catch(SyncException e) {
+			} catch(Exception e) {
 				log.log(e.msg);
 			}
 		};
@@ -136,7 +136,7 @@ int main(string[] args)
 			log.vlog("[M] Item deleted: ", path);
 			try {
 				sync.deleteByPath(path);
-			} catch(SyncException e) {
+			} catch(Exception e) {
 				log.log(e.msg);
 			}
 		};
@@ -144,7 +144,7 @@ int main(string[] args)
 			log.vlog("[M] Item moved: ", from, " -> ", to);
 			try {
 				sync.uploadMoveItem(from, to);
-			} catch(SyncException e) {
+			} catch(Exception e) {
 				log.log(e.msg);
 			}
 		};
@@ -184,7 +184,7 @@ void performSync(SyncEngine sync)
 			sync.applyDifferences();
 			sync.scanForDifferences(".");
 			count = -1;
-		} catch (SyncException e) {
+		} catch (Exception e) {
 			if (++count == 3) throw e;
 			else log.log(e.msg);
 		}
diff --git a/src/onedrive.d b/src/onedrive.d
index fcc7aa4e..ff02ac7f 100644
--- a/src/onedrive.d
+++ b/src/onedrive.d
@@ -18,21 +18,16 @@ private immutable {
 
 class OneDriveException: Exception
 {
+	// https://docs.microsoft.com/en-us/onedrive/developer/rest-api/concepts/errors
 	int httpStatusCode;
-	// https://dev.onedrive.com/misc/errors.htm
 	JSONValue error;
 
-	@nogc @safe pure nothrow this(string msg, Throwable next, string file = __FILE__, size_t line = __LINE__)
-	{
-		super(msg, file, line, next);
-	}
-
 	@safe pure this(int httpStatusCode, string reason, string file = __FILE__, size_t line = __LINE__)
 	{
 		this.httpStatusCode = httpStatusCode;
 		this.error = error;
 		string msg = format("HTTP request returned status code %d (%s)", httpStatusCode, reason);
-		super(msg, file, line, next);
+		super(msg, file, line);
 	}
 
 	this(int httpStatusCode, string reason, ref const JSONValue error, string file = __FILE__, size_t line = __LINE__)
@@ -40,7 +35,7 @@ class OneDriveException: Exception
 		this.httpStatusCode = httpStatusCode;
 		this.error = error;
 		string msg = format("HTTP request returned status code %d (%s)\n%s", httpStatusCode, reason, toJSON(error, true));
-		super(msg, file, line, next);
+		super(msg, file, line);
 	}
 }
 
@@ -380,11 +375,7 @@ final class OneDriveApi
 			content ~= data;
 			return data.length;
 		};
-		try {
-			http.perform();
-		} catch (CurlException e) {
-			throw new OneDriveException(e.msg, e);
-		}
+		http.perform();
 		JSONValue json;
 		try {
 			json = content.parseJSON();
diff --git a/src/sync.d b/src/sync.d
index aa133021..68d9244d 100644
--- a/src/sync.d
+++ b/src/sync.d
@@ -99,14 +99,9 @@ private bool testFileHash(string path, const ref Item item)
 
 class SyncException: Exception
 {
-    @nogc @safe pure nothrow this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null)
+    @nogc @safe pure nothrow this(string msg, string file = __FILE__, size_t line = __LINE__)
     {
-        super(msg, file, line, next);
-    }
-
-    @nogc @safe pure nothrow this(string msg, Throwable next, string file = __FILE__, size_t line = __LINE__)
-    {
-        super(msg, file, line, next);
+        super(msg, file, line);
     }
 }
 
@@ -419,21 +414,13 @@ final class SyncEngine
 	// scan the given directory for differences
 	public void scanForDifferences(string path)
 	{
-		try {
-			log.vlog("Uploading differences ...");
-			Item item;
-			if (itemdb.selectByPath(path, item)) {
-				uploadDifferences(item);
-			}
-			log.vlog("Uploading new items ...");
-			uploadNewItems(path);
-		} catch (ErrnoException e) {
-			throw new SyncException(e.msg, e);
-		} catch (FileException e) {
-			throw new SyncException(e.msg, e);
-		} catch (OneDriveException e) {
-			throw new SyncException(e.msg, e);
+		log.vlog("Uploading differences ...");
+		Item item;
+		if (itemdb.selectByPath(path, item)) {
+			uploadDifferences(item);
 		}
+		log.vlog("Uploading new items ...");
+		uploadNewItems(path);
 	}
 
 	private void uploadDifferences(Item item)