diff --git a/src/botPage/bot/TradeEngine/Total.js b/src/botPage/bot/TradeEngine/Total.js
index 355c7c6446..64a567e559 100644
--- a/src/botPage/bot/TradeEngine/Total.js
+++ b/src/botPage/bot/TradeEngine/Total.js
@@ -1,7 +1,7 @@
 import { translate } from '../../../common/i18n';
 import { roundBalance } from '../../common/tools';
 import { info, notify } from '../broadcast';
-import createError from '../../common/error';
+import { createError } from '../../common/error';
 import { observer as globalObserver } from '../../../common/utils/observer';
 
 const skeleton = {
diff --git a/src/botPage/bot/TradeEngine/index.js b/src/botPage/bot/TradeEngine/index.js
index 9af841a0b8..aaec4f3c65 100644
--- a/src/botPage/bot/TradeEngine/index.js
+++ b/src/botPage/bot/TradeEngine/index.js
@@ -3,7 +3,7 @@ import { createStore, applyMiddleware } from 'redux';
 import thunk from 'redux-thunk';
 import { durationToSecond } from '../../../common/utils/tools';
 import { translate } from '../../..//common/i18n';
-import createError from '../../common/error';
+import { createError } from '../../common/error';
 import { doUntilDone } from '../tools';
 import { expectInitArg, expectTradeOptions } from '../sanitize';
 import Proposal from './Proposal';
diff --git a/src/botPage/bot/sanitize.js b/src/botPage/bot/sanitize.js
index e5e07b6525..26c5244b8c 100644
--- a/src/botPage/bot/sanitize.js
+++ b/src/botPage/bot/sanitize.js
@@ -1,5 +1,5 @@
 import { translate } from '../../common/i18n';
-import createError from '../common/error';
+import { createError } from '../common/error';
 
 const isPositiveNumber = num => Number.isFinite(num) && num > 0;
 
diff --git a/src/botPage/common/error.js b/src/botPage/common/error.js
index 50ba49bf20..69458cfdb2 100644
--- a/src/botPage/common/error.js
+++ b/src/botPage/common/error.js
@@ -1,7 +1,13 @@
-const createError = (name, message) => {
+import { observer as globalObserver } from '../../common/utils/observer';
+import { translate } from '../../common/i18n';
+
+export const createError = (name, message) => {
     const e = new Error(message);
     e.name = name;
     return e;
 };
 
-export default createError;
+export const createErrorAndEmit = (name, message) => {
+    globalObserver.emit('ui.log.warn', `${translate(message)}`);
+    return createError(name, message);
+};
diff --git a/src/botPage/view/blockly/index.js b/src/botPage/view/blockly/index.js
index ce92b40a5b..f5d9c60fd4 100644
--- a/src/botPage/view/blockly/index.js
+++ b/src/botPage/view/blockly/index.js
@@ -16,7 +16,7 @@ import {
     cleanBeforeExport,
 } from './utils';
 import Interpreter from '../../bot/Interpreter';
-import createError from '../../common/error';
+import { createErrorAndEmit } from '../../common/error';
 import { translate, xml as translateXml } from '../../../common/i18n';
 import { getLanguage } from '../../../common/lang';
 import { observer as globalObserver } from '../../../common/utils/observer';
@@ -315,14 +315,45 @@ export default class _Blockly {
     }
     /* eslint-disable class-methods-use-this */
     load(blockStr = '', dropEvent = {}) {
-        let xml;
+        const unrecognisedMsg = () => translate('Unrecognized file format');
+
+        try {
+            const xmlDoc = new DOMParser().parseFromString(blockStr, 'application/xml');
 
+            if (xmlDoc.getElementsByTagName('parsererror').length) {
+                throw new Error();
+            }
+        } catch (err) {
+            throw createErrorAndEmit('FileLoad', unrecognisedMsg());
+        }
+
+        let xml;
         try {
             xml = Blockly.Xml.textToDom(blockStr);
         } catch (e) {
-            throw createError('FileLoad', translate('Unrecognized file format'));
+            throw createErrorAndEmit('FileLoad', unrecognisedMsg());
         }
 
+        const blocklyXml = xml.querySelectorAll('block');
+
+        if (!blocklyXml.length) {
+            throw createErrorAndEmit(
+                'FileLoad',
+                'XML file contains unsupported elements. Please check or modify file.'
+            );
+        }
+
+        blocklyXml.forEach(block => {
+            const blockType = block.getAttribute('type');
+
+            if (!Object.keys(Blockly.Blocks).includes(blockType)) {
+                throw createErrorAndEmit(
+                    'FileLoad',
+                    'XML file contains unsupported elements. Please check or modify file'
+                );
+            }
+        });
+
         try {
             if (xml.hasAttribute('collection') && xml.getAttribute('collection') === 'true') {
                 loadBlocks(xml, dropEvent);
@@ -330,7 +361,7 @@ export default class _Blockly {
                 loadWorkspace(xml);
             }
         } catch (e) {
-            throw createError('FileLoad', translate('Unable to load the block file'));
+            throw createErrorAndEmit('FileLoad', translate('Unable to load the block file'));
         }
     }
     /* eslint-disable class-methods-use-this */