diff --git a/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/MongoIOManager.java b/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/MongoIOManager.java
index a823d14..5136efb 100644
--- a/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/MongoIOManager.java
+++ b/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/MongoIOManager.java
@@ -669,6 +669,10 @@ public class MongoIOManager {
 							f=null;
 						}
 					}
+					if (f==null) {
+						logger.warn("The objectID is not present. Going to abort the current operation");
+						throw new RemoteBackendException("Object id "+serverLocation+" not found.");
+					}
 		// if the remote identifier is not a specified as ID, try to check if it is a valid remote path 
 		// in this case the remote identifier is a valid objectID but it indicates a path
 				}else if ((remoteResourceIdentifier != null) && (!(remoteResourceIdentifier.equals(REMOTE_RESOURCE.ID))) && (f==null)){
diff --git a/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java b/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java
index edb7dfa..4f89fa3 100644
--- a/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java
+++ b/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java
@@ -290,6 +290,7 @@ public class SoftCopyOperator extends SoftCopy {
 	 */
 	private boolean isMap(GridFSDBFile sourceObject) {
 		String type=sourceObject.get("type").toString();
+		logger.debug("object type: "+type);
 		if(type.equals("map"))
 			return true;
 		return false;