diff --git a/src/command/handlers/cmd_piezo.c b/src/command/handlers/cmd_piezo.c
index 917ba69..444a214 100644
--- a/src/command/handlers/cmd_piezo.c
+++ b/src/command/handlers/cmd_piezo.c
@@ -175,9 +175,13 @@ int cmd_mtb(const uint8_t *data, uint8_t data_len)
                 processing = false;
                 return 1;
             }
-        }
 
-        cmd_send_response_rim(tx_rim_samples, rim_count); // IMU FIFO 샘플 rim: 전송
+            cmd_send_response_rim(tx_rim_samples, rim_count); // IMU FIFO 샘플 rim: 전송
+        }
+        else
+        {
+            cmd_send_response_rim_error();
+        }
     }
     DBG_PRINTF("[CMD] mtb status=0x%04X\r\n", status);