diff --git a/node_modules/architect-build/build_support/mini_require.js b/node_modules/architect-build/build_support/mini_require.js
index 60194f04..b63d37f7 100644
--- a/node_modules/architect-build/build_support/mini_require.js
+++ b/node_modules/architect-build/build_support/mini_require.js
@@ -61,14 +61,15 @@ var define = function(name, deps, callback) {
         define.lastModule = name;
 };
 var defQueue = [];
-var addToLoadQueue = function(missing, deps, callback) {
+var addToLoadQueue = function(missing, deps, callback, errback) {
     var toLoad = missing.length;
     var map = {};
     define.queue.push({
         deps: deps,
         map: map,
         toLoad: toLoad,
-        callback: callback
+        callback: callback,
+        errback: errback
     });
     
     for (var i = 0; i < missing.length; ++i) {
@@ -82,9 +83,24 @@ var addToLoadQueue = function(missing, deps, callback) {
 };
 
 var processLoadQueue = function(err, id) {
+    var changed = false;
+    if (err) {
+        define.errors[err.id] = err;
+        define.queue.forEach(function(r) {
+            if (r.map[err.id]) {
+                r.toLoad = -1;
+                if (r.errback) r.errback(err);
+            }
+        });
+        if (define.lastModule = err.id)
+            define.lastModule = null;
+        define.pending = define.pending.filter(function(p) {
+            return p != err.id;
+        });
+        changed = true;
+    }
+    
     if (defQueue.length) {
-        if (err)
-            throw err;
         if (defQueue.length > 1)
             throw new Error("more than one module in defqueue");
         define(id, defQueue[0][0], defQueue[0][1]);
@@ -92,7 +108,6 @@ var processLoadQueue = function(err, id) {
     }
     
     var pending = define.pending;
-    var changed = false;
     define.queue.forEach(function(r) {
         pending.forEach(function(id) {
             if (r.map[id])
@@ -102,15 +117,17 @@ var processLoadQueue = function(err, id) {
             r.toLoad--;
         if (!r.toLoad) {
             changed = true;
-            _require("", r.deps, r.callback);
+            _require("", r.deps, r.callback, r.errback);
         }
     });
+    
     define.lastModule = null;
     if (pending.length)
         define.pending = [];
+    
     if (changed) {
         define.queue = define.queue.filter(function(r) {
-            return r.toLoad;
+            return r.toLoad > 0;
         });
     }
 };
@@ -118,6 +135,7 @@ var processLoadQueue = function(err, id) {
 define.amd = true;
 define.queue = [];
 define.loaded = {};
+define.errors = {};
 define.loading = {};
 define.pending = [];
 define.modules = { require: 1, exports: 1, module: 1 };
@@ -182,7 +200,7 @@ var lookup = function(moduleName) {
     return mod;
 };
 
-var _require = function(parentId, moduleName, callback) {
+var _require = function(parentId, moduleName, callback, errback) {
     if (typeof moduleName === "string") {
         var depName = normalizeName(parentId, moduleName);
         var module = lookup(depName);
@@ -197,7 +215,7 @@ var _require = function(parentId, moduleName, callback) {
             var args = deps.map(lookup);
             return callback && callback.apply(null, args);
         } else {
-            return addToLoadQueue(missing, deps, callback);
+            return addToLoadQueue(missing, deps, callback, errback);
         }
     }
     if (_require.original)
@@ -256,6 +274,7 @@ config.paths = Object.create(null);
 require.undef = function(module, callback) {
     module = normalizeName("", module);
     var path = require.toUrl(module, ".js");
+    delete define.errors[module];
     delete define.loaded[module];
     delete define.modules[module];
     delete define.fetchedUrls[path];
@@ -302,6 +321,7 @@ require.toUrl = function(moduleName, ext, skipExt) {
 };
 
 var loadScript = function(path, id, callback) {
+    // TODO use importScripts for webworkers
     var head = document.head || document.documentElement;
     var s = document.createElement("script");
     s.src = path;
@@ -320,6 +340,12 @@ var loadScript = function(path, id, callback) {
                 callback(null, id);
         }
     };
+    s.onerror = function(e) {
+        processLoadQueue({
+            id: id,
+            path: path
+        });
+    }
 };
 
 require.load = function(module) {