diff --git a/components/iot-plugins/androidsense-plugin/org.wso2.carbon.device.mgt.iot.androidsense.api/src/main/java/org/wso2/carbon/device/mgt/iot/androidsense/service/impl/AndroidSenseServiceImpl.java b/components/iot-plugins/androidsense-plugin/org.wso2.carbon.device.mgt.iot.androidsense.api/src/main/java/org/wso2/carbon/device/mgt/iot/androidsense/service/impl/AndroidSenseServiceImpl.java
index 9f2ab2da5..a1307dfa6 100644
--- a/components/iot-plugins/androidsense-plugin/org.wso2.carbon.device.mgt.iot.androidsense.api/src/main/java/org/wso2/carbon/device/mgt/iot/androidsense/service/impl/AndroidSenseServiceImpl.java
+++ b/components/iot-plugins/androidsense-plugin/org.wso2.carbon.device.mgt.iot.androidsense.api/src/main/java/org/wso2/carbon/device/mgt/iot/androidsense/service/impl/AndroidSenseServiceImpl.java
@@ -79,7 +79,7 @@ public class AndroidSenseServiceImpl implements AndroidSenseService {
                     deviceIdentifiers);
             return Response.ok().build();
         } catch (InvalidDeviceException e) {
-            String msg = "Error occurred while executing command operation to send keywords";
+            String msg = "Invalid Device Identifiers found.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).build();
         } catch (DeviceAccessAuthorizationException e) {
@@ -119,7 +119,7 @@ public class AndroidSenseServiceImpl implements AndroidSenseService {
                                                               deviceIdentifiers);
             return Response.ok().build();
         } catch (InvalidDeviceException e) {
-            String msg = "Error occurred while executing command operation to send keywords";
+            String msg = "Invalid Device Identifiers found.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).build();
         } catch (DeviceAccessAuthorizationException e) {
@@ -158,7 +158,7 @@ public class AndroidSenseServiceImpl implements AndroidSenseService {
                                                               deviceIdentifiers);
             return Response.ok().build();
         } catch (InvalidDeviceException e) {
-            String msg = "Error occurred while executing command operation to send keywords";
+            String msg = "Invalid Device Identifiers found.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).build();
         } catch (DeviceAccessAuthorizationException e) {
diff --git a/components/iot-plugins/arduino-plugin/org.wso2.carbon.device.mgt.iot.arduino.api/src/main/java/org/wso2/carbon/device/mgt/iot/arduino/service/impl/ArduinoServiceImpl.java b/components/iot-plugins/arduino-plugin/org.wso2.carbon.device.mgt.iot.arduino.api/src/main/java/org/wso2/carbon/device/mgt/iot/arduino/service/impl/ArduinoServiceImpl.java
index ca709ddd6..b8ad08569 100644
--- a/components/iot-plugins/arduino-plugin/org.wso2.carbon.device.mgt.iot.arduino.api/src/main/java/org/wso2/carbon/device/mgt/iot/arduino/service/impl/ArduinoServiceImpl.java
+++ b/components/iot-plugins/arduino-plugin/org.wso2.carbon.device.mgt.iot.arduino.api/src/main/java/org/wso2/carbon/device/mgt/iot/arduino/service/impl/ArduinoServiceImpl.java
@@ -80,7 +80,7 @@ public class ArduinoServiceImpl implements ArduinoService {
                     deviceIdentifiers);
             return Response.status(Response.Status.OK.getStatusCode()).build();
         } catch (InvalidDeviceException e) {
-            String msg = "Error occurred while executing command operation to send keywords";
+            String msg = "Invalid Device Identifiers found.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).build();
         } catch (DeviceAccessAuthorizationException e) {
diff --git a/components/iot-plugins/raspberrypi-plugin/org.wso2.carbon.device.mgt.iot.raspberrypi.api/src/main/java/org/wso2/carbon/device/mgt/iot/raspberrypi/service/impl/RaspberryPiServiceImpl.java b/components/iot-plugins/raspberrypi-plugin/org.wso2.carbon.device.mgt.iot.raspberrypi.api/src/main/java/org/wso2/carbon/device/mgt/iot/raspberrypi/service/impl/RaspberryPiServiceImpl.java
index 36347ab6a..86787a2b8 100644
--- a/components/iot-plugins/raspberrypi-plugin/org.wso2.carbon.device.mgt.iot.raspberrypi.api/src/main/java/org/wso2/carbon/device/mgt/iot/raspberrypi/service/impl/RaspberryPiServiceImpl.java
+++ b/components/iot-plugins/raspberrypi-plugin/org.wso2.carbon.device.mgt.iot.raspberrypi.api/src/main/java/org/wso2/carbon/device/mgt/iot/raspberrypi/service/impl/RaspberryPiServiceImpl.java
@@ -91,7 +91,7 @@ public class RaspberryPiServiceImpl implements RaspberryPiService {
                     deviceIdentifiers);
             return Response.ok().build();
         } catch (InvalidDeviceException e) {
-            String msg = "Error occurred while executing command operation to send keywords";
+            String msg = "Invalid Device Identifiers found.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).build();
         } catch (DeviceAccessAuthorizationException e) {