diff --git a/Gruntfile.js b/Gruntfile.js
index 0a888fe1c..47d9e0787 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -15,6 +15,7 @@ module.exports = function (grunt) {
   grunt.loadTasks('build/tasks');
 
   var langs;
+  var wrapper = !!grunt.option('wrapper');
   if (grunt.option('lang')) {
     langs = (grunt.option('lang') || '').split(/[,;]/g).map(function (lang) {
       lang = lang.trim();
@@ -85,11 +86,11 @@ module.exports = function (grunt) {
         files: langs.map(function (lang, i) {
           return {
             src: [
-              'lib/intro.stub',
+              wrapper ? 'lib/custom/intro.stub' : 'lib/intro.stub',
               '<%= concat.engine.coreFiles %>',
               // include rules / checks / commons
               '<%= configure.rules.files[' + i + '].dest.auto %>',
-              'lib/outro.stub'
+              wrapper ? 'lib/custom/outro.stub' : 'lib/outro.stub'
             ],
             dest: 'axe' + lang + '.js'
           };
@@ -127,7 +128,8 @@ module.exports = function (grunt) {
         entry: 'lib/commons/aria/index.js',
         destFile: 'doc/aria-supported.md',
         options: {
-          langs: langs
+          langs: langs,
+          wrapper: wrapper
         },
         listType: 'unsupported' // Possible values for listType: 'supported', 'unsupported', 'all'
       }
diff --git a/build/tasks/aria-supported.js b/build/tasks/aria-supported.js
index 257b52ed5..efe43437f 100644
--- a/build/tasks/aria-supported.js
+++ b/build/tasks/aria-supported.js
@@ -16,7 +16,8 @@ module.exports = function (grunt) {
        * hence cannot be required at the top of the file.
        */
       const done = this.async();
-      const { langs } = this.options();
+      const { langs, wrapper } = this.options();
+      if (wrapper) return true;
       const fileNameSuffix = langs && langs.length > 0 ? `${langs[0]}` : '';
       const axe = require(`../../axe${fileNameSuffix}`);
       const listType = this.data.listType.toLowerCase();
diff --git a/lib/core/public/load.js b/lib/core/public/load.js
index 124c849b1..e80d3d8f6 100644
--- a/lib/core/public/load.js
+++ b/lib/core/public/load.js
@@ -1,8 +1,10 @@
+/*global a11yEngine*/
 import Audit from '../base/audit';
 import cleanup from './cleanup';
 import runRules from './run-rules';
 import respondable from '../utils/respondable';
 import nodeSerializer from '../utils/node-serializer';
+import mergeErrors from '../utils/merge-errors';
 
 /**
  * Sets up Rules, Messages and default options for Checks, must be invoked before attempting analysis
@@ -36,6 +38,21 @@ function runCommand(data, keepalive, callback) {
         (results, cleanupFn) => {
           // Serialize all DqElements
           results = nodeSerializer.mapRawResults(results);
+
+          //a11y-engine iframe rules error merging logic
+          const errors = a11yEngine.getErrors();
+          if (Object.keys(errors).length !== 0) {
+            if (results[results.length - 1].a11yEngineErrors) {
+              const error = results.pop();
+              delete error.a11yEngineErrors;
+              const mergedErrors = mergeErrors(error, errors);
+              results.push({ ...mergedErrors, a11yEngineErrors: true });
+            } else {
+              results.push({ ...errors, a11yEngineErrors: true });
+            }
+          }
+          a11yEngine.clearErrors();
+
           resolve(results);
           // Cleanup AFTER resolve so that selectors can be generated
           cleanupFn();
diff --git a/lib/core/public/run-rules.js b/lib/core/public/run-rules.js
index 5eb26d7c9..8e04c13dc 100644
--- a/lib/core/public/run-rules.js
+++ b/lib/core/public/run-rules.js
@@ -1,3 +1,4 @@
+/*global a11yEngine*/
 import Context from '../base/context';
 import teardown from './teardown';
 import {
@@ -36,6 +37,12 @@ export default function runRules(context, options, resolve, reject) {
     performanceTimer.auditStart();
   }
 
+  // If advanced run for iframes is true then setup socket for iframes
+  if (options.a11yEngineConfig && options.a11yEngineConfig.iframesAdvancedRun) {
+    a11yEngine.setup(options.a11yEngineConfig);
+  }
+
+  // If run for iframes is true then collect results from iframes
   if (context.frames.length && options.iframes !== false) {
     q.defer((res, rej) => {
       collectResultsFromFrames(context, options, 'rules', null, res, rej);
@@ -59,6 +66,13 @@ export default function runRules(context, options, resolve, reject) {
 
       // after should only run once, so ensure we are in the top level window
       if (context.initiator) {
+        // Return a11y-engine errors when at top level window
+        if (results[results.length - 1].a11yEngineErrors) {
+          const error = results.pop();
+          delete error.a11yEngineErrors;
+          a11yEngine.mergeErrors(error);
+        }
+
         results = audit.after(results, options);
 
         results.forEach(publishMetaData);
diff --git a/lib/core/utils/collect-results-from-frames.js b/lib/core/utils/collect-results-from-frames.js
index be17f8ccf..e19e356a8 100644
--- a/lib/core/utils/collect-results-from-frames.js
+++ b/lib/core/utils/collect-results-from-frames.js
@@ -22,6 +22,14 @@ export default function collectResultsFromFrames(
   // elementRefs can't be passed across frame boundaries
   options = { ...options, elementRef: false };
 
+  // check a11yengine iframe advance run flag
+  if (
+    options.a11yEngineConfig &&
+    options.a11yEngineConfig.iframesAdvancedRun === false
+  ) {
+    options.a11yEngineConfig.iframesAdvancedRun = true;
+  }
+
   var q = queue();
   var frames = parentContent.frames;
 
diff --git a/lib/core/utils/merge-errors.js b/lib/core/utils/merge-errors.js
new file mode 100644
index 000000000..7fffe01eb
--- /dev/null
+++ b/lib/core/utils/merge-errors.js
@@ -0,0 +1,52 @@
+// Function to merge errors for a11y-engine.
+// Handles errors differently for check_errors and other errors.
+// It also adds the target selector to the errors for better identification.
+
+function mergeErrors(mergedErrors, frameErrors, frameSpec) {
+  for (const [key, value] of Object.entries(frameErrors)) {
+    if (key === 'check_errors') {
+      if (!mergedErrors[key]) {
+        mergedErrors[key] = {};
+      }
+
+      for (const [checkNameKey, checkNameValue] of Object.entries(value)) {
+        // Add the target if not present. If present then append parents target.
+        checkNameValue.forEach(checkNameValueError => {
+          if (!checkNameValueError.target && frameSpec) {
+            checkNameValueError.target = frameSpec?.selector;
+          } else if (checkNameValueError.target && frameSpec) {
+            checkNameValueError.target = [
+              ...frameSpec.selector,
+              ...checkNameValueError.target
+            ];
+          }
+        });
+        if (mergedErrors[key][checkNameKey]) {
+          mergedErrors[key][checkNameKey].push(...checkNameValue);
+        } else {
+          mergedErrors[key][checkNameKey] = Array.isArray(checkNameValue)
+            ? [...checkNameValue]
+            : [checkNameValue];
+        }
+      }
+    } else {
+      // Add the target if not present. If present then append parents target.
+      value.forEach(errorValue => {
+        if (!errorValue.target && frameSpec) {
+          errorValue.target = frameSpec?.selector;
+        } else if (errorValue.target && frameSpec) {
+          errorValue.target = [...frameSpec.selector, ...errorValue.target];
+        }
+      });
+      if (mergedErrors[key]) {
+        mergedErrors[key] = [...mergedErrors[key], ...value];
+      } else {
+        mergedErrors[key] = value;
+      }
+    }
+  }
+
+  return mergedErrors;
+}
+
+export default mergeErrors;
diff --git a/lib/core/utils/merge-results.js b/lib/core/utils/merge-results.js
index e5c9547ad..0e6277132 100644
--- a/lib/core/utils/merge-results.js
+++ b/lib/core/utils/merge-results.js
@@ -1,6 +1,7 @@
 import nodeSerializer from './node-serializer';
 import getAllChecks from './get-all-checks';
 import findBy from './find-by';
+import mergeErrors from './merge-errors';
 
 /**
  * Adds the owning frame's CSS selector onto each instance of DqElement
@@ -75,6 +76,8 @@ function normalizeResult(result) {
  */
 function mergeResults(frameResults, options) {
   const mergedResult = [];
+  // A11yEngine merged errors
+  let mergedErrors = {};
   frameResults.forEach(frameResult => {
     const results = normalizeResult(frameResult);
     if (!results || !results.length) {
@@ -82,6 +85,13 @@ function mergeResults(frameResults, options) {
     }
 
     const frameSpec = getFrameSpec(frameResult);
+    // Extract existing errors and merge with new ones
+    if (results[results.length - 1].a11yEngineErrors) {
+      const error = results.pop();
+      delete error.a11yEngineErrors;
+      mergedErrors = mergeErrors(mergedErrors, error, frameSpec);
+    }
+
     results.forEach(ruleResult => {
       if (ruleResult.nodes && frameSpec) {
         pushFrame(ruleResult.nodes, options, frameSpec);
@@ -106,7 +116,11 @@ function mergeResults(frameResults, options) {
       });
     }
   });
-  return mergedResult;
+
+  if (Object.keys(mergedErrors).length === 0) {
+    return mergedResult;
+  }
+  return [...mergedResult, { ...mergedErrors, a11yEngineErrors: true }];
 }
 
 function nodeIndexSort(nodeIndexesA = [], nodeIndexesB = []) {
diff --git a/lib/custom/intro.stub b/lib/custom/intro.stub
new file mode 100644
index 000000000..9ed8b3c4b
--- /dev/null
+++ b/lib/custom/intro.stub
@@ -0,0 +1,15 @@
+/*! axe v<%= pkg.version %>
+ * Copyright (c) 2015 - <%= grunt.template.today("yyyy") %> Deque Systems, Inc.
+ *
+ * Your use of this Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This entire copyright notice must appear in every copy of this file you
+ * distribute or in any file that contains substantial portions of this source
+ * code.
+ */
+const createAxe = () => (function axeFunction (window) {
+  // A window reference is required to access the axe object in a "global".
+  var global = window;
+  var document = window.document;
diff --git a/lib/custom/outro.stub b/lib/custom/outro.stub
new file mode 100644
index 000000000..19fd22a6e
--- /dev/null
+++ b/lib/custom/outro.stub
@@ -0,0 +1,2 @@
+
+}( typeof window === 'object' ? window : this ));
diff --git a/package.json b/package.json
index 6c9a3e1fa..5d5beb356 100644
--- a/package.json
+++ b/package.json
@@ -71,6 +71,7 @@
     "develop": "grunt dev --force",
     "api-docs": "jsdoc --configure .jsdoc.json",
     "build": "grunt",
+    "build:wrapper": "grunt --wrapper=true",
     "eslint": "eslint --color --format stylish '{lib,test,build,doc}/**/*.js' 'Gruntfile.js'",
     "test": "npm run test:tsc && run-s \"test:unit:* -- {@}\" --",
     "test:tsc": "tsc",