diff --git a/web/app/corpora/events.py b/web/app/corpora/events.py
index cdc6bc7c3654b4ea1be7951021001d9db75f38a3..e941ba5b04d3bd73ac947008b9c49ae8a74c32bc 100644
--- a/web/app/corpora/events.py
+++ b/web/app/corpora/events.py
@@ -35,41 +35,58 @@ def init_corpus_analysis(corpus_id):
 def corpus_analysis_get_meta_data(corpus_id):
     # get meta data from db
     db_corpus = Corpus.query.get(corpus_id)
-    # TODO: Check if current user is actually the creator of the corpus?
     metadata = {}
     metadata['corpus_name'] = db_corpus.title
     metadata['corpus_description'] = db_corpus.description
     metadata['corpus_creation_date'] = db_corpus.creation_date.isoformat()
     metadata['corpus_last_edited_date'] = db_corpus.last_edited_date.isoformat()
-    # get meta data from corpus in cqp server
     client = corpus_analysis_clients.get(request.sid)
-    client_corpus = client.corpora.get('CORPUS')
-    metadata['corpus_properties'] = client_corpus.attrs['properties']
-    metadata['corpus_size_tokens'] = client_corpus.attrs['size']
+    if client is None:
+        response = {'code': 424, 'desc': 'No client found for this session',
+                    'msg': 'Failed Dependency'}
+        socketio.emit('corpus_analysis_query', response, room=request.sid)
+        return
+    # check if client is busy or not
+    if client.status == 'running':
+        client.status = 'abort'
+        while client.status != 'ready':
+            socketio.sleep(0.1)
+    # get meta data from corpus in cqp server
+    client.status = 'running'
+    try:
+        client_corpus = client.corpora.get('CORPUS')
+        metadata['corpus_properties'] = client_corpus.attrs['properties']
+        metadata['corpus_size_tokens'] = client_corpus.attrs['size']
 
-    text_attr = client_corpus.structural_attributes.get('text')
-    struct_attrs = client_corpus.structural_attributes.list(filters={'part_of': text_attr})
-    text_ids = range(0, (text_attr.attrs['size']))
-    texts_metadata = {}
-    for text_id in text_ids:
-        texts_metadata[text_id] = {}
-        for struct_attr in struct_attrs:
-            texts_metadata[text_id][struct_attr.attrs['name'][(len(text_attr.attrs['name']) + 1):]] = struct_attr.values_by_ids(list(range(struct_attr.attrs['size'])))[text_id]
-    metadata['corpus_all_texts'] = texts_metadata
-    metadata['corpus_analysis_date'] = datetime.utcnow().isoformat()
-    metadata['corpus_cqi_py_protocol_version'] = client.api.version
-    metadata['corpus_cqi_py_package_version'] = cqi.__version__
-    metadata['corpus_cqpserver_version'] = 'CQPserver v3.4.22'  # TODO: make this dynamically
+        text_attr = client_corpus.structural_attributes.get('text')
+        struct_attrs = client_corpus.structural_attributes.list(filters={'part_of': text_attr})
+        text_ids = range(0, (text_attr.attrs['size']))
+        texts_metadata = {}
+        for text_id in text_ids:
+            texts_metadata[text_id] = {}
+            for struct_attr in struct_attrs:
+                texts_metadata[text_id][struct_attr.attrs['name'][(len(text_attr.attrs['name']) + 1):]] = struct_attr.values_by_ids(list(range(struct_attr.attrs['size'])))[text_id]
+        metadata['corpus_all_texts'] = texts_metadata
+        metadata['corpus_analysis_date'] = datetime.utcnow().isoformat()
+        metadata['corpus_cqi_py_protocol_version'] = client.api.version
+        metadata['corpus_cqi_py_package_version'] = cqi.__version__
+        metadata['corpus_cqpserver_version'] = 'CQPserver v3.4.22'  # TODO: make this dynamically
 
-    # write some metadata to the db
-    db_corpus.current_nr_of_tokens = metadata['corpus_size_tokens']
-    db.session.commit()
+        # write some metadata to the db
+        db_corpus.current_nr_of_tokens = metadata['corpus_size_tokens']
+        db.session.commit()
 
-    # emit data
-    payload = metadata
-    response = {'code': 200, 'desc': 'Corpus meta data', 'msg': 'OK',
-                'payload': payload}
-    socketio.emit('corpus_analysis_meta_data', response, room=request.sid)
+        # emit data
+        payload = metadata
+        response = {'code': 200, 'desc': 'Corpus meta data', 'msg': 'OK',
+                    'payload': payload}
+        socketio.emit('corpus_analysis_meta_data', response, room=request.sid)
+    except cqi.errors.CQiException as e:
+        payload = {'code': e.code, 'desc': e.description, 'msg': e.name}
+        response = {'code': 500, 'desc': None, 'msg': 'Internal Server Error',
+                    'payload': payload}
+        socketio.emit('corpus_analysis_meta_data', response, room=request.sid)
+    client.status = 'ready'
 
 
 @socketio.on('corpus_analysis_query')
@@ -100,7 +117,6 @@ def corpus_analysis_query(query):
                'match_count': results.attrs['size']}
     response = {'code': 200, 'desc': None, 'msg': 'OK', 'payload': payload}
     socketio.emit('corpus_analysis_query', response, room=request.sid)
-    # TODO: Stop here and add a new method for transmission
     chunk_size = 100
     chunk_start = 0
     context = 50
@@ -142,6 +158,11 @@ def corpus_analysis_inspect_match(payload):
         socketio.emit('corpus_analysis_inspect_match', response,
                       room=request.sid)
         return
+    if client.status == 'running':
+        client.status = 'abort'
+        while client.status != 'ready':
+            socketio.sleep(0.1)
+    client.status = 'running'
     try:
         corpus = client.corpora.get('CORPUS')
         s = corpus.structural_attributes.get('s')
@@ -171,6 +192,7 @@ def corpus_analysis_inspect_match(payload):
                     'type': type,
                     'data_indexes': data_indexes}
     socketio.emit('corpus_analysis_inspect_match', response, room=request.sid)
+    client.status = 'ready'
 
 
 def corpus_analysis_session_handler(app, corpus_id, user_id, session_id):
diff --git a/web/app/static/js/modules/corpus_analysis/view/InteractionElement.js b/web/app/static/js/modules/corpus_analysis/view/InteractionElement.js
deleted file mode 100644
index 0fa3fbb706ce9967d4d196461fbc2ac0186e9a9a..0000000000000000000000000000000000000000
--- a/web/app/static/js/modules/corpus_analysis/view/InteractionElement.js
+++ /dev/null
@@ -1,97 +0,0 @@
-// TODO: Simplify this so that things are executed on change page and on first
-// load look below at function doc strings
-
-// one interaction can have more than one type when the associatee callback
-// can be executed
-
-class Interaction {
-  constructor(htmlId="",
-              checkStatus=true,
-              disabledBefore=true,
-              disabledAfter=false,
-              hideBefore=true,
-              hideAfter=false) {
-    this.htmlId = htmlId;
-    this.element = ((htmlId) => {
-      document.getElementById(htmlId);
-    })()
-    this.checkStatus = checkStatus;
-    this.callbacks = {};
-    this.disabledBefore = disabledBefore;
-    this.disabledAfter = disabledAfter;
-    this.hideBefore = hideBefore;
-    this.hideAfter = hideAfter;
-  }
-
-  setCallback(trigger, callback, bindThis, args=[]) {
-    this.callbacks[trigger] = {
-                                 "function": callback,
-                                 "bindThis": bindThis,
-                                 "args": args
-                              };
-  }
-
-  bindThisToCallback(trigger) {
-    let callback = this.callbacks[trigger];
-    let boundedCallback = callback["function"].bind(callback.bindThis);
-    return boundedCallback;
-  }
-}
-
-class Interactions {
-  constructor() {
-    this.interactions = [];
-  }
-
-  addInteractions (interactions) {
-    this.interactions.push(...interactions);
-  }
-
-  /**
-   * This function executes all registered interactions of the type
-   * onElementChange.
-   * Interactions and their associated callbacks will be executed every time
-   * a chante event occurs on the specified element.
-   */
-  onElementChangeExecute() {
-    // checks if a change for every interactionElement happens and executes
-    // the callbacks accordingly
-    for (let interaction of this.interactions) {
-      if (interaction.checkStatus) {
-        interaction.element.addEventListener("change", (event) => {
-          if (event.target.checked) {
-            let f_on = interaction.bindThisToCallback("on");
-            let args_on = interaction.callbacks.on.args;
-            f_on(...args_on);
-          } else if (!event.target.checked){
-            let f_off = interaction.bindThisToCallback("off");
-            let args_off = interaction.callbacks.off.args;
-            f_off(...args_off);
-          }
-        });
-      } else {
-        continue
-      }
-    };
-  }
-
-  /**
-   * This function executes all registered interactions of the type onQueryLoad.
-   * Interactions and their associated callbacks will be executed once if when
-   * the first query results of a query request are being displayed.
-   */
-  onQueryLoadExecute() {
-  }
-
-  /**
-   * This function executes all registered interactions of the type
-   * onPageChange.
-   * Interactions and their associated callbacks will be executed everytime if
-   * the user used the page navigation and a new result page is being displayed.
-   */
-  onPageChangeExecute() {
-  }
-}
-
-// export Classes
-export { InteractionElement, InteractionElements };
\ No newline at end of file
diff --git a/web/app/static/js/modules/corpus_analysis/view/ResultsView.js b/web/app/static/js/modules/corpus_analysis/view/ResultsView.js
index 46c82f028143cf606373a41504df040affcdc3a6..2fe6ba1bd036d37c9daa1e8f06f05d6cdfe2fad8 100644
--- a/web/app/static/js/modules/corpus_analysis/view/ResultsView.js
+++ b/web/app/static/js/modules/corpus_analysis/view/ResultsView.js
@@ -251,7 +251,8 @@ class ResultsList extends List {
     /**
      * Also activate/deactivate buttons in the table/jsList results accordingly
      * if button in inspect was activated/deactivated.
-     * This part only runs if tableCall is false.
+     * This part only runs if tableCall is set to false when this function is
+     * called.
      */
     if (!tableCall) {
       this.getHTMLElements(['#query-results-table']);
@@ -350,7 +351,7 @@ class ResultsList extends List {
     this.contextModal.open();
     // add a button to add this match to sub results with onclick event
     let classes = `btn-floating btn waves-effect` +
-                  `waves-light grey right`
+                  ` waves-light grey right`
     let addToSubResultsIdsBtn = document.createElement("a");
     addToSubResultsIdsBtn.setAttribute("class", classes + ` add`);
     addToSubResultsIdsBtn.innerHTML = '<i class="material-icons">add</i>';
@@ -545,12 +546,10 @@ class ResultsList extends List {
       this.page = this.displayOptionsFormResultsPerPage.value;
       this.update();
     }
-    // TODO: reimplement the followinmg stuff
-    // this.activateInspect();
-    // this.pageChangeEventInteractionHandler(interactionElements);
-    // if (expertModeSwitchElement.checked) {
-    //   this.expertModeOn("query-display");  // page holds new result rows, so add new tooltips
-    // }
+    this.activateInspect();
+    if (this.displayOptionsFormExpertMode.checked) {
+      this.expertModeOn("query-display");
+    }
   }
 
   // Event function triggered on context select change
@@ -612,7 +611,7 @@ class ResultsList extends List {
       this.currentExpertTokenElements[htmlId] = [];
     }
     let container = document.getElementById(htmlId);
-    let tokens = container.querySelectorAll("span.token");
+    let tokens = container.querySelectorAll('span.token');
     this.currentExpertTokenElements[htmlId].push(...tokens);
     this.eventTokens[htmlId] = [];
     for (let tokenElement of this.currentExpertTokenElements[htmlId]) {
diff --git a/web/app/static/js/modules/corpus_analysis/view/callbacks.js b/web/app/static/js/modules/corpus_analysis/view/callbacks.js
index 8e0a36c39f3617a206c6ab33d9efec2f8710b4d3..d9c8592604cac0f735abc2aac0daa1e0e44f3881 100644
--- a/web/app/static/js/modules/corpus_analysis/view/callbacks.js
+++ b/web/app/static/js/modules/corpus_analysis/view/callbacks.js
@@ -51,17 +51,17 @@ function queryDataPreparingCallback(resultsList, detail) {
   resultsList.clear()
   // get needed HTML Elements
   let results = detail.results;
-  resultsList.getHTMLElements(
-    ['#interactions-menu',
-     '#recieved-match-count',
-     '#total-match-count',
-     '#text-lookup-count',
-     '#text-lookup-titles',
-     '#query-results-user-feedback',
-     '#query-progress-bar',
-     '#query-results-create',
-     '#sub-results-match-ids',
-     '#nr-marked-matches',
+  resultsList.getHTMLElements([
+    '#interactions-menu',
+    '#recieved-match-count',
+    '#total-match-count',
+    '#text-lookup-count',
+    '#text-lookup-titles',
+    '#query-results-user-feedback',
+    '#query-progress-bar',
+    '#query-results-create',
+    '#sub-results-match-ids',
+    '#nr-marked-matches',
    ]);
   // show or enable some things for the user
   resultsList.interactionsMenu.classList.toggle('hide', false)
@@ -108,6 +108,10 @@ function queryDataRecievingCallback(resultsList, detail) {
   resultsList.update();
   resultsList.changeHitsPerPage();
   resultsList.changeContext();
+  //activate expertMode of switch is checked
+  if (resultsList.displayOptionsFormExpertMode.checked) {
+    resultsList.expertModeOn('query-display', results);
+  }
   } else if (!client.dynamicMode) {
     results.jsList.add(resultItems, (items) => {
       for (let item of items) {
diff --git a/web/app/templates/corpora/analyse_corpus.html.j2 b/web/app/templates/corpora/analyse_corpus.html.j2
index 86c4978f294281b02d975b3f9bc964fa2ce79004..d940e6ffa17290fe9336ee9a38837c1f8ec533b4 100644
--- a/web/app/templates/corpora/analyse_corpus.html.j2
+++ b/web/app/templates/corpora/analyse_corpus.html.j2
@@ -123,8 +123,9 @@ document.addEventListener("DOMContentLoaded", () => {
                              'dynamicMode': true});
   /**
   * Initializing the results object as a model holding all the data of a query.
-  * Also holds the metadata of one query. After that initialize the ResultsList
-  * object as the View handeling the represnetation of the data.
+  * Also holds the metadata of one query.
+  * After that initialize the ResultsList object as the View handeling the
+  * represnetation of the data for the user.
   */
   let results = new Results();
   let resultsList = new ResultsList('result-list', ResultsList.options);
@@ -174,7 +175,7 @@ document.addEventListener("DOMContentLoaded", () => {
                                   listenForResults]);
   client.loadSocketEventListeners();
   /**
-  * Register resultsList listeners listening to nitification events.
+  * Register resultsList listeners listening to notification events.
   */
   const listenForClientNotification = new ViewEventListener('notify-view',
                                                             recieveClientNotification);
@@ -221,7 +222,28 @@ document.addEventListener("DOMContentLoaded", () => {
     '#query-results-download-modal',
     '#query-results-table',
     '#display-options-form-expert_mode',
+    '.pagination',
   ]);
+
+  /**
+   * The following listener handles what functions are called when the user
+   * does use the page navigation to navigate to a new page.
+   */
+  for (let element of resultsList.pagination) {
+    element.addEventListener("click", (event) => {
+      // shows match context according to the user picked value
+      resultsList.changeContext();
+      // activates or deactivates expertMode on new page depending switch value
+      if (resultsList.displayOptionsFormExpertMode.checked) {
+        resultsList.expertModeOn('query-display', results);
+      } else {
+        resultsList.expertModeOff('query-display');
+      }
+      // activates inspect buttons on new page if client is not busy
+      resultsList.activateInspect();
+    });
+  }
+
   /**
    * The following event Listener handles the expert mode switch for the list
    */