diff --git a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.html b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.html
index dae35721404d1c3b2c56314dccf27b78876fb2c8..12bc01e1c198550599d5e754da96046c1ac91c16 100644
--- a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.html
+++ b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.html
@@ -5,7 +5,7 @@
       data-i18n=No such document was found
       data-i18n=Create New
       data-i18n=Explore the Search Result List
-      data-i18n=No such document was found
+      data-i18n=Invalid search criteria
     -->
     <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
     <meta name="viewport" content="width=device-width" />
diff --git a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.xml b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.xml
index 3097fbba7d4fbfa738872c28bd72b4c32496e57e..7c1e2d834e1c74f99ada0503af5e1033397ac601 100644
--- a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.xml
+++ b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_html.xml
@@ -232,7 +232,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>971.20733.1333.20838</string> </value>
+                <value> <string>974.59811.2178.43622</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -250,7 +250,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1541150851.14</float>
+                        <float>1563201471.02</float>
                         <string>UTC</string>
                       </tuple>
                     </state>
diff --git a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.js b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.js
index cd6796ecea6b81c6a074d98bf33c3e37f8215fdf..aadbf0cdfc1f3c7e1c7f6706dbdcd7151a898d25 100644
--- a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.js
+++ b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.js
@@ -243,7 +243,8 @@
       return RSVP.Queue()
         .push(function () {
           var plane = gadget.element.querySelector("a"),
-            ul = gadget.element.querySelector(".search_ul");
+            ul = gadget.element.querySelector(".search_ul"),
+            translation_promise;
           plane.href = '';
 
           // uid is known
@@ -309,92 +310,114 @@
               return RSVP.delay(200);
             })
             .push(function () {
-              return RSVP.all([
-                gadget.jio_allDocs({
-                  query: Query.objectToSearchText(new ComplexQuery({
-                    operator: "AND",
-                    query_list: [
-                      QueryFactory.create(
-                        new URI(gadget.state.query).query(true).query
-                      ),
-                      new SimpleQuery({
-                        key: gadget.state.catalog_index,
-                        value: value_text
-                      })
-                    ]
-                  })),
-                  limit: [0, 10],
-                  select_list: [gadget.state.catalog_index, "uid"],
-                  sort_on: JSON.parse(gadget.state.sort_list_json)
-                }),
-                gadget.getTranslationList([
-                  'Create New',
-                  'Explore the Search Result List'
-                ])
+              translation_promise = gadget.getTranslationList([
+                'Create New',
+                'Explore the Search Result List'
               ]);
-            })
-            .push(function (result_list) {
-              var i,
-                row,
-                portal_type_list,
-                translated_portal_type_list,
-                fragment_element = document.createDocumentFragment(),
-                li_element;
-
-              plane.className = JUMP_UNKNOWN_CLASS_STR;
 
-              // Documents
+              return gadget.jio_allDocs({
+                query: Query.objectToSearchText(new ComplexQuery({
+                  operator: "AND",
+                  query_list: [
+                    QueryFactory.create(
+                      new URI(gadget.state.query).query(true).query
+                    ),
+                    new SimpleQuery({
+                      key: gadget.state.catalog_index,
+                      value: value_text
+                    })
+                  ]
+                })),
+                limit: [0, 10],
+                select_list: [gadget.state.catalog_index, "uid"],
+                sort_on: JSON.parse(gadget.state.sort_list_json)
+              })
+                .push(function (result) {
+                  return new RSVP.Queue()
+                    .push(function () {
+                      return RSVP.all([result, translation_promise]);
+                    })
+                    .push(function (result_list) {
+                      var i,
+                        row,
+                        portal_type_list,
+                        translated_portal_type_list,
+                        fragment_element = document.createDocumentFragment(),
+                        li_element;
+
+                      plane.className = JUMP_UNKNOWN_CLASS_STR;
+
+                      // Documents
 // <li class="ui-icon-sign-in ui-btn-icon-right" data-relative-url="{{id}}"
 //     data-uid="{{uid}}">{{value}}</li>
-              for (i = 0; i < result_list[0].data.rows.length; i += 1) {
-                row = result_list[0].data.rows[i];
-                li_element = document.createElement('li');
-                li_element.setAttribute('class',
-                                        'ui-icon-sign-in ui-btn-icon-right');
-                li_element.setAttribute('data-relative-url', row.id);
-                li_element.setAttribute('data-uid', row.value.uid);
-                li_element.textContent = row.value[gadget.state.catalog_index];
-                fragment_element.appendChild(li_element);
-              }
-
-              // New documents
+                      for (i = 0; i < result_list[0].data.rows.length; i += 1) {
+                        row = result_list[0].data.rows[i];
+                        li_element = document.createElement('li');
+                        li_element.setAttribute('class',
+                          'ui-icon-sign-in ui-btn-icon-right');
+                        li_element.setAttribute('data-relative-url', row.id);
+                        li_element.setAttribute('data-uid', row.value.uid);
+                        li_element.textContent =
+                          row.value[gadget.state.catalog_index];
+                        fragment_element.appendChild(li_element);
+                      }
+
+                      // New documents
 //  <li class="ui-icon-plus ui-btn-icon-right" data-i18n="Create New"
 //      data-create-object="{{value}}" name="{{name}}">Create New
 //    <span> {{name}}: {{../value}}</span></li>
-              if (gadget.state.allow_creation) {
-                portal_type_list = JSON.parse(gadget.state.portal_types);
-                translated_portal_type_list =
-                  JSON.parse(gadget.state.translated_portal_types);
-                for (i = 0; i < portal_type_list.length; i += 1) {
-                  li_element = document.createElement('li');
-                  li_element.setAttribute('class',
-                                          'ui-icon-plus ui-btn-icon-right');
-                  li_element.setAttribute('data-create-object',
-                                          portal_type_list[i]);
-                  li_element.setAttribute('name',
-                                          translated_portal_type_list[i]);
-                  li_element.textContent =
-                    result_list[1][0] + ' ' + translated_portal_type_list[i] +
-                    ': ' + value_text;
-                  fragment_element.appendChild(li_element);
-                }
-              }
-
-              // Explore
+                      if (gadget.state.allow_creation) {
+                        portal_type_list =
+                          JSON.parse(gadget.state.portal_types);
+                        translated_portal_type_list =
+                          JSON.parse(gadget.state.translated_portal_types);
+                        for (i = 0; i < portal_type_list.length; i += 1) {
+                          li_element = document.createElement('li');
+                          li_element.setAttribute('class',
+                            'ui-icon-plus ui-btn-icon-right');
+                          li_element.setAttribute('data-create-object',
+                                                  portal_type_list[i]);
+                          li_element.setAttribute('name',
+                            translated_portal_type_list[i]);
+                          li_element.textContent =
+                            result_list[1][0] + ' ' +
+                            translated_portal_type_list[i] +
+                            ': ' + value_text;
+                          fragment_element.appendChild(li_element);
+                        }
+                      }
+
+                      // Explore
 // <li class="ui-icon-search ui-btn-icon-right" data-explore=true
 //     data-i18n="Explore the Search Result List" ></li>
-              li_element = document.createElement('li');
-              li_element.setAttribute('class',
-                                      'ui-icon-search ui-btn-icon-right');
-              li_element.setAttribute('data-explore',
-                                      true);
-              li_element.textContent = result_list[1][1];
-              fragment_element.appendChild(li_element);
-
-              while (ul.firstChild) {
-                ul.removeChild(ul.firstChild);
-              }
-              ul.appendChild(fragment_element);
+                      li_element = document.createElement('li');
+                      li_element.setAttribute('class',
+                        'ui-icon-search ui-btn-icon-right');
+                      li_element.setAttribute('data-explore',
+                                              true);
+                      li_element.textContent = result_list[1][1];
+                      fragment_element.appendChild(li_element);
+
+                      while (ul.firstChild) {
+                        ul.removeChild(ul.firstChild);
+                      }
+                      ul.appendChild(fragment_element);
+                    });
+                }, function (error) {
+                  if (error instanceof Error &&
+                      error.hash &&
+                      error.hash.expected &&
+                      error.hash.expected.length === 1 &&
+                      error.hash.expected[0] === "'QUOTE'") {
+                    return gadget.getTranslationList([
+                      "Invalid search criteria"
+                    ])
+                      .push(function (translation_list) {
+                        return gadget.notifyInvalid(translation_list[0]);
+                      });
+                  }
+                  throw error;
+                });
             });
         });
 
diff --git a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.xml b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.xml
index 33202becdcd926132408bdf99ed7a649f2d06d09..a13a0a390bd48d46cc1a144e87312bb7522902e9 100644
--- a/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.xml
+++ b/bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_relation_input_js.xml
@@ -234,7 +234,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>971.23288.3697.17425</string> </value>
+                <value> <string>977.6117.6830.21572</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -252,7 +252,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1541156739.42</float>
+                        <float>1563260997.53</float>
                         <string>UTC</string>
                       </tuple>
                     </state>
@@ -311,7 +311,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1541669313.00</float>
+                        <float>1541669313.0</float>
                         <string>UTC</string>
                       </tuple>
                     </state>
diff --git a/bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testRelationFieldBackslash.xml b/bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testRelationFieldBackslash.xml
new file mode 100644
index 0000000000000000000000000000000000000000..5fff8d2a9df3a4d180bc66f3994e4586177eb6a0
--- /dev/null
+++ b/bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testRelationFieldBackslash.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="ZopePageTemplate" module="Products.PageTemplates.ZopePageTemplate"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_bind_names</string> </key>
+            <value>
+              <object>
+                <klass>
+                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
+                </klass>
+                <tuple/>
+                <state>
+                  <dictionary>
+                    <item>
+                        <key> <string>_asgns</string> </key>
+                        <value>
+                          <dictionary>
+                            <item>
+                                <key> <string>name_subpath</string> </key>
+                                <value> <string>traverse_subpath</string> </value>
+                            </item>
+                          </dictionary>
+                        </value>
+                    </item>
+                  </dictionary>
+                </state>
+              </object>
+            </value>
+        </item>
+        <item>
+            <key> <string>content_type</string> </key>
+            <value> <string>text/html</string> </value>
+        </item>
+        <item>
+            <key> <string>expand</string> </key>
+            <value> <int>0</int> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>testRelationFieldBackslash</string> </value>
+        </item>
+        <item>
+            <key> <string>output_encoding</string> </key>
+            <value> <string>utf-8</string> </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <unicode></unicode> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>
diff --git a/bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testRelationFieldBackslash.zpt b/bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testRelationFieldBackslash.zpt
new file mode 100644
index 0000000000000000000000000000000000000000..575c3f9aa8fa794e5b15d4daf2e62c2e3eae073e
--- /dev/null
+++ b/bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testRelationFieldBackslash.zpt
@@ -0,0 +1,115 @@
+<html xmlns:tal="http://xml.zope.org/namespaces/tal"
+      xmlns:metal="http://xml.zope.org/namespaces/metal">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Test RenderJS UI</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">Test RenderJS UI</td></tr>
+</thead><tbody>
+<tal:block metal:use-macro="here/Zuite_CommonTemplate/macros/init" />
+
+<!-- Clean Up -->
+<tr>
+  <td>open</td>
+  <td>&#36;{base_url}/foo_module/ListBoxZuite_reset</td>
+  <td></td>
+</tr>
+<tr>
+  <td>assertTextPresent</td>
+  <td>Reset Successfully.</td>
+  <td></td>
+</tr>
+
+<!-- Initialize -->
+<tr>
+  <td>open</td>
+  <td>&#36;{base_url}/foo_module/FooModule_createObjects?num:int=1</td>
+  <td></td>
+</tr>
+<tr>
+  <td>waitForTextPresent</td>
+  <td>Created Successfully.</td>
+  <td></td>
+</tr>
+
+<tal:block metal:use-macro="here/Zuite_CommonTemplate/macros/wait_for_activities" />
+
+<tr>
+  <td>open</td>
+  <td>&#36;{base_url}/web_site_module/renderjs_runner/#/foo_module?editable=true</td>
+  <td></td>
+</tr>
+<tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_app_loaded" />
+
+<!-- Go to foo_module/0 in View tab -->
+<tr>
+  <td>waitForElementPresent</td>
+  <td>//a[text()="Title 0"]</td>
+  <td></td>
+</tr>
+<tr>
+  <td>click</td>
+  <td>//a[text()="Title 0"]</td>
+  <td></td>
+</tr>
+<tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_content_loaded" />
+
+<!-- Check the relation field does not crash when typing a backslash -->
+<tr>
+  <td>type</td>
+  <td>//input[@name="field_my_foo_category_title"]</td>
+  <td>\</td>
+</tr>
+<tr>
+  <td>fireEvent</td>
+  <td>//input[@name='field_my_foo_category_title']</td>
+  <td>input</td>
+</tr>
+<tr>
+  <!-- This behavior may change.
+       Actually, this popup is displayed on internal query "syntax" error.
+       This error will be fixed later and so the popup won't be shown anymore. -->
+  <td>waitForTextPresent</td>
+  <td>Invalid search criteria</td>
+  <td></td>
+</tr>
+
+<!-- Check we can continue to work by selecting an existing category and save -->
+<tr>
+  <td>type</td>
+  <td>//input[@name="field_my_foo_category_title"]</td>
+  <td>Quantity</td>
+</tr>
+<tr>
+  <td>fireEvent</td>
+  <td>//input[@name='field_my_foo_category_title']</td>
+  <td>input</td>
+</tr>
+<tr>
+  <td>waitForElementPresent</td>
+  <td>//li[@data-relative-url='portal_categories/divergence_scope/quantity']</td>
+  <td></td>
+</tr>
+<tr>
+  <td>fireEvent</td>
+  <td>//input[@name='field_my_foo_category_title']</td>
+  <td>blur</td>
+</tr>
+<tr>
+  <td>click</td>
+  <td>//li[@data-relative-url='portal_categories/divergence_scope/quantity']</td>
+  <td></td>
+</tr>
+<tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/save" />
+<tr>
+  <td>verifyValue</td>
+  <td>//input[@name="field_my_foo_category_title"]</td>
+  <td>Quantity</td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
\ No newline at end of file