diff --git a/src/main.d b/src/main.d
index e09bcffd..5d71ce54 100644
--- a/src/main.d
+++ b/src/main.d
@@ -532,12 +532,13 @@ int main(string[] cliArgs) {
 				
 				// Do we perform a sync with OneDrive?
 				if (notificationReceived || (currentTime - lastCheckTime > checkOnlineInterval) || (monitorLoopFullCount == 0)) {
+					// Increment monitorLoopFullCount
+					monitorLoopFullCount++;
 					log.vdebug(loopStartOutputMessage);
+					log.vdebug("Loop Number: ", monitorLoopFullCount);
 					log.log("Starting a sync with Microsoft OneDrive");
 					SysTime startFunctionProcessingTime = Clock.currTime();
 					log.vdebug("Start Monitor Loop Time:              ", startFunctionProcessingTime);
-					// Increment monitorLoopFullCount
-					monitorLoopFullCount++;
 					
 					// Did the user specify --upload-only?
 					if (appConfig.getValueBool("upload_only")) {
diff --git a/src/onedrive.d b/src/onedrive.d
index 4f078015..bf01a5f5 100644
--- a/src/onedrive.d
+++ b/src/onedrive.d
@@ -284,13 +284,13 @@ class OneDriveApi {
 		} else {
 			// Try and read the value from the appConfig if it is set, rather than trying to read the value from disk
 			if (!appConfig.refreshToken.empty) {
+				log.vdebug("read token from appConfig");
 				refreshToken = appConfig.refreshToken;
 				authorised = true;
 			} else {
 				// Try and read the file from disk
 				try {
 					refreshToken = readText(appConfig.refreshTokenFilePath);
-						
 					// is the refresh_token empty?
 					if (refreshToken.empty) {
 						log.error("refreshToken exists but is empty: ", appConfig.refreshTokenFilePath);
@@ -298,6 +298,8 @@ class OneDriveApi {
 					} else {
 						// existing token not empty
 						authorised = true;
+						// update appConfig.refreshToken
+						appConfig.refreshToken = refreshToken;	
 					}
 				} catch (FileException e) {
 					authorised = authorise();
@@ -308,6 +310,11 @@ class OneDriveApi {
 					authorised = false;
 				}
 			}
+			
+			if (refreshToken.empty) {
+				// PROBLEM
+				writeln("refreshToken is empty !!!!!!!!!! will cause 4xx errors");
+			}
 		}
 		// Return if we are authorised
 		log.vdebug("Authorised State: ", authorised);
diff --git a/src/sync.d b/src/sync.d
index 4a5fe422..3239037b 100644
--- a/src/sync.d
+++ b/src/sync.d
@@ -1773,12 +1773,16 @@ class SyncEngine {
 		// Function variables
 		JSONValue deltaChangesBundle;
 		// Get the /delta data for this account | driveId | deltaLink combination
+		// Create a new API Instance for this thread and initialise it
+		OneDriveApi getDeltaQueryOneDriveApiInstance;
+		getDeltaQueryOneDriveApiInstance = new OneDriveApi(appConfig);
+		getDeltaQueryOneDriveApiInstance.initialise();
 		try {
-			deltaChangesBundle = oneDriveApiInstance.viewChangesByItemId(selectedDriveId, selectedItemId, providedDeltaLink);
+			deltaChangesBundle = getDeltaQueryOneDriveApiInstance.viewChangesByItemId(selectedDriveId, selectedItemId, providedDeltaLink);
 		} catch (OneDriveException exception) {
 			log.vdebug("deltaChangesBundle = oneDriveApiInstance.viewChangesByItemId() generated a OneDriveException");
-			// display error and exit
-			defaultUnhandledHTTPErrorCode(exception);
+			// display error message
+			displayOneDriveErrorMessage(exception.msg, getFunctionName!({}));
 		}
 		
 		// If the JSON response is a correct JSON object, and has an 'id' we can set these details