diff --git a/lib/api/ktcmis/ktVersioningService.inc.php b/lib/api/ktcmis/ktVersioningService.inc.php
index 0d940a3..944c391 100644
--- a/lib/api/ktcmis/ktVersioningService.inc.php
+++ b/lib/api/ktcmis/ktVersioningService.inc.php
@@ -88,23 +88,16 @@ class KTVersioningService extends KTCMISBase {
      * @return array results
      */
     // TODO set up delivery of content stream? or is that up to the CMIS client?
-    public function checkOut($repositoryId, $objectId)
+    public function checkOut($repositoryId, &$objectId)
     {
         try {
             $result = $this->VersioningService->checkOut($repositoryId, $objectId);
         }
-        catch (Exception $e)
-        {
-            return array(
-                "status_code" => 1,
-                "message" => $e->getMessage()
-            );
+        catch (Exception $e) {
+            throw $e;
         }
 
-        return array(
-            'status_code' => 0,
-            'results' => (!empty($result) ? $result : 'Document Checked Out')
-        );
+        return $result;
     }
     
     /**
@@ -113,28 +106,14 @@ class KTVersioningService extends KTCMISBase {
      * @param string $repositoryId
      * @param string $objectId
      */
-    // TODO exceptions:
-    //      •	ConstraintViolationException: The Repository SHALL throw this exception if ANY of the following conditions are met:
-    //      o	The Document’s Object-Type definition’s versionable attribute is FALSE. 
-    //      •	updateConflictException
-    //      •	versioningException
     public function cancelCheckOut($repositoryId, $objectId)
     {
         try {
             $result = $this->VersioningService->cancelCheckOut($repositoryId, $objectId);
         }
-        catch (Exception $e)
-        {
-            return array(
-                "status_code" => 1,
-                "message" => $e->getMessage()
-            );
+        catch (Exception $e) {
+            throw $e;
         }
-
-        return array(
-            'status_code' => 0,
-            'results' => (!empty($result) ? $result : 'Document Checkout Cancelled')
-        );
     }
     
     /**
@@ -155,21 +134,14 @@ class KTVersioningService extends KTCMISBase {
     						$checkinComment = '', $policies = array(), $addACEs = array(), $removeACEs = array())
     {
         try {
-            $result = $this->VersioningService->checkIn($repositoryId, $objectId, $major, $properties, $contentStream, 
-            											$checkinComment, $policies, $addACEs, $removeACEs);
+            $objectId = $this->VersioningService->checkIn($repositoryId, $objectId, $major, $properties, $contentStream, 
+            											  $checkinComment, $policies, $addACEs, $removeACEs);
         }
-        catch (Exception $e)
-        {
-            return array(
-                "status_code" => 1,
-                "message" => $e->getMessage()
-            );
+        catch (Exception $e) {
+            throw $e;
         }
 
-        return array(
-            'status_code' => 0,
-            'results' => (!empty($result) ? $result : 'Document Checked In Successfully')
-        );
+        return $objectId;
     }
 
 }
diff --git a/lib/api/ktcmis/services/CMISVersioningService.inc.php b/lib/api/ktcmis/services/CMISVersioningService.inc.php
index fcd1b7d..54a9cfc 100644
--- a/lib/api/ktcmis/services/CMISVersioningService.inc.php
+++ b/lib/api/ktcmis/services/CMISVersioningService.inc.php
@@ -99,8 +99,6 @@ class CMISVersioningService {
      * @param string $repositoryId
      * @param string $objectId
      */
-    // TODO exceptions:
-    //      •	versioningException - The repository MAY throw this exception if the object is a non-current Document Version.
     public function cancelCheckOut($repositoryId, $objectId)
     {
         $objectId = CMISUtil::decodeObjectId($objectId, $typeId);
@@ -158,7 +156,6 @@ class CMISVersioningService {
     public function checkIn($repositoryId, $objectId, $major = true, $properties = array(), $contentStream = null,
                             $checkinComment = '', $policies = array(), $addACEs = array(), $removeACEs = array())
     {
-        
         $objectId = CMISUtil::decodeObjectId($objectId, $typeId);
         
         // throw updateConflictException if the operation is attempting to update an object that is no longer current (as determined by the repository).
diff --git a/webservice/atompub/cmis/KT_cmis_atom_server.services.inc.php b/webservice/atompub/cmis/KT_cmis_atom_server.services.inc.php
index 0010888..8ab006c 100644
--- a/webservice/atompub/cmis/KT_cmis_atom_server.services.inc.php
+++ b/webservice/atompub/cmis/KT_cmis_atom_server.services.inc.php
@@ -530,12 +530,11 @@ class KT_cmis_atom_service_pwc extends KT_cmis_atom_service {
         $repositoryId = KT_cmis_atom_service_helper::getRepositoryId($RepositoryService);
         $VersioningService = new KTVersioningService(KT_cmis_atom_service_helper::getKt());
 
-        $response = $VersioningService->cancelCheckout($repositoryId, $this->params[0]);
-
-        if ($response['status_code'] == 1) {
-            $feed = KT_cmis_atom_service_helper::getErrorFeed($this, self::STATUS_SERVER_ERROR, $response['message']);
-            // Expose the responseFeed
-            $this->responseFeed = $feed;
+        try {
+            $response = $VersioningService->cancelCheckout($repositoryId, $this->params[0]);
+        }
+        catch (Exception $e) {
+            $this->responseFeed = KT_cmis_atom_service_helper::getErrorFeed($this, $this->getStatusCode($e), $e->getMessage());
             return null;
         }
 
@@ -677,15 +676,14 @@ class KT_cmis_atom_service_checkedout extends KT_cmis_atom_service {
             return null;
         }
 
-        $response = $VersioningService->checkOut($repositoryId, $cmisObjectProperties['cmis:objectId']);
-
-        if ($response['status_code'] == 1) {
-            $feed = KT_cmis_atom_service_helper::getErrorFeed($this, self::STATUS_SERVER_ERROR, 'No object was specified for checkout');
-            // Expose the responseFeed
-            $this->responseFeed = $feed;
+        try {
+            $response = $VersioningService->checkOut($repositoryId, $cmisObjectProperties['cmis:objectId']);
+        }
+        catch (Exception $e) {
+            $this->responseFeed = KT_cmis_atom_service_helper::getErrorFeed($this, $this->getStatusCode($e), $e->getMessage());
             return null;
         }
-
+        
         $this->setStatus(self::STATUS_CREATED);
         $feed = KT_cmis_atom_service_helper::getObjectFeed($this, $ObjectService, $repositoryId, $cmisObjectProperties['cmis:objectId'], 'POST');