diff --git a/api/src/org/apache/cloudstack/api/command/admin/host/FindHostsForMigrationCmd.java b/api/src/org/apache/cloudstack/api/command/admin/host/FindHostsForMigrationCmd.java
index e6e45cc7246..b2d77b85dd2 100644
--- a/api/src/org/apache/cloudstack/api/command/admin/host/FindHostsForMigrationCmd.java
+++ b/api/src/org/apache/cloudstack/api/command/admin/host/FindHostsForMigrationCmd.java
@@ -45,7 +45,7 @@ public class FindHostsForMigrationCmd extends BaseListCmd {
     /////////////////////////////////////////////////////
 
     @Parameter(name=ApiConstants.VIRTUAL_MACHINE_ID, type=CommandType.UUID, entityType = UserVmResponse.class,
-            required=false, description="find hosts to which this VM can be migrated and flag the hosts with enough " +
+            required=true, description="find hosts to which this VM can be migrated and flag the hosts with enough " +
                 "CPU/RAM to host the VM")
     private Long virtualMachineId;
 
diff --git a/server/src/com/cloud/server/ManagementServerImpl.java b/server/src/com/cloud/server/ManagementServerImpl.java
index f74b7ad964c..06c0f964ccb 100755
--- a/server/src/com/cloud/server/ManagementServerImpl.java
+++ b/server/src/com/cloud/server/ManagementServerImpl.java
@@ -1086,17 +1086,16 @@ public class ManagementServerImpl extends ManagerBase implements ManagementServe
 
         VMInstanceVO vm = _vmInstanceDao.findById(vmId);
         if (vm == null) {
-            InvalidParameterValueException ex = new InvalidParameterValueException("Unable to find the VM with specified id");
-            ex.addProxyObject(vm, vmId, "vmId");
+            InvalidParameterValueException ex = new InvalidParameterValueException("Unable to find the VM with given id");
             throw ex;
         }
 
         if (vm.getState() != State.Running) {
             if (s_logger.isDebugEnabled()) {
-                s_logger.debug("VM is not Running, unable to migrate the vm" + vm);
+                s_logger.debug("VM is not running, cannot migrate the vm" + vm);
             }
-            InvalidParameterValueException ex = new InvalidParameterValueException("VM is not Running, unable to" +
-                    " migrate the vm with specified id");
+            InvalidParameterValueException ex = new InvalidParameterValueException("VM is not Running, cannot " +
+                    "migrate the vm with specified id");
             ex.addProxyObject(vm, vmId, "vmId");
             throw ex;
         }