diff --git a/src/components/Main.js b/src/components/Main.js
index 032cf8f69c4a9e7864fbb7e77e27ab9971ff1b01..e6477483f5143a3625fcc8c81c18d85f60560b6a 100644
--- a/src/components/Main.js
+++ b/src/components/Main.js
@@ -9,8 +9,8 @@ import {
 
 import NavigationBar from './NavigationBar';
 import WelcomePage from '../pages/welcome/WelcomePage';
-import ADEXBackendsPage from '../pages/benchmarking/ADEXBackendsPage';
-import FocusProjectPage from '../pages/skyview/FocusProjectPage';
+import BenchmarkingPage from '../pages/benchmarking/BenchmarkingPage';
+import SkyViewPage from '../pages/skyview/SkyViewPage';
 import ConfigurationPage from "../pages/configuration/ConfigurationPage";
 import FetchADEXData from '../data/FetchADEXData';
 import AncillaryPage from "../pages/ancillary/AncillaryPage";
@@ -33,10 +33,10 @@ export default function Main() {
                         <WelcomePage />
                     </Route>
                     <Route exact path="/benchmarking">
-                        <ADEXBackendsPage />
+                        <BenchmarkingPage />
                     </Route>
                     <Route exact path="/skyview">
-                        <FocusProjectPage />
+                        <SkyViewPage />
                     </Route>
                     <Route exact path="/ancillary">
                         <AncillaryPage />
@@ -50,7 +50,7 @@ export default function Main() {
                 </Switch>
             </div>
             <footer>
-                <small>version 17 april 2023 - 13:00</small>
+                <small>version 18 april 2023 - 8:00</small>
             </footer>
         </Router>
 
diff --git a/src/contexts/GlobalStateReducer.js b/src/contexts/GlobalStateReducer.js
index 2edc1807088fb83d0f6d5714a0649c35c6f2aac3..f87005d9f7e2619da721ceb95c057703f73b0af9 100644
--- a/src/contexts/GlobalStateReducer.js
+++ b/src/contexts/GlobalStateReducer.js
@@ -34,17 +34,13 @@ export const SHOW_LABELS = 'SHOW_LABELS'
 export const SET_LABEL_FIELD = 'SET_LABEL_FIELD'
 export const SET_SIMBAD_ENABLED = 'SET_SIMBAD_ENABLED'
 
-const api_host =
-    process.env.NODE_ENV === "development"
-        ? "localhost:8000"
-        : "sdc.astron.nl";
-
 const default_adex_backend =
     process.env.NODE_ENV === "development"
         ? {
             "name": "localhost:8000",
             "type": "primary_dp",
             "url": "http://localhost:8000",
+            //"url": "https://sdc-dev.astron.nl", // uncomment if you don't want to run the adex-backend locally
         }
         : {
             "name": "sdc.astron.nl",
@@ -68,7 +64,7 @@ export const initialState = {
         data_limit: 10000,
         labels_enabled      : false,
         label_field         : 'name',
-        collection          : {name: ""}
+        // collection          : {name: ""}
 }
 
 export const reducer = (state, action) => {
diff --git a/src/data/FetchADEXData.js b/src/data/FetchADEXData.js
index 9c5806fb1540741a0470f8dc11c41171fec19916..dc0d136b3ad1a426d8d8f70dad34c37c4885682e 100644
--- a/src/data/FetchADEXData.js
+++ b/src/data/FetchADEXData.js
@@ -116,40 +116,47 @@ export default function FetchADEXData(skipAbortController) {
     }
 
     async function fetchSkyviewDataAsync()  {
+
+        // only fetch when there is a collection selected to fetch
+        // (this prevents a fetch during initialisation of the app).
+        if (my_state.collection === undefined) {
+            return null
+        }
+
         let url = constructUrl()
 
-        my_dispatch({type: SET_STATUS_ADEX, status_adex: 'fetching'})
-        let startTime = new Date()
-
-        try {
-            const response = await fetch(url, {signal: controller.signal})
-            const data = await response.json()
-
-            let results = constructResults(data)
-            let endTime = new Date()
-            let timeDiff = endTime - startTime
-
-            my_dispatch({type: SET_FETCHED_ADEX, fetched_adex: results})
-            my_dispatch({type: SET_NUMBER_OF_DATAPRODUCTS, number_of_dataproducts: results.length})
-            my_dispatch({type: SET_STATUS_ADEX, status_adex: 'fetched (' + timeDiff.toString() + ' ms)'})
-            my_dispatch({type: ALADIN_RELOAD, aladin_reload: !my_state.aladin_reload})
-
-        } catch(error) {
-            if (error.name === 'AbortError') {
-                console.log('Fetch was aborted');
-                my_dispatch({type: SET_NUMBER_OF_DATAPRODUCTS, number_of_dataproducts: 0})
-                my_dispatch({type: SET_STATUS_ADEX, status_adex: 'fetch aborted'})
-            } else {
-                my_dispatch({type: SET_NUMBER_OF_DATAPRODUCTS, number_of_dataproducts: 0})
-                my_dispatch({type: SET_STATUS_ADEX, status_adex: 'failed'})
+        if (my_state.status_adex !== 'fetching') {
+            my_dispatch({type: SET_STATUS_ADEX, status_adex: 'fetching'})
+            let startTime = new Date()
+
+            try {
+                const response = await fetch(url, {signal: controller.signal})
+                const data = await response.json()
+
+                let results = constructResults(data)
+                let endTime = new Date()
+                let timeDiff = endTime - startTime
+
+                my_dispatch({type: SET_FETCHED_ADEX, fetched_adex: results})
+                my_dispatch({type: SET_NUMBER_OF_DATAPRODUCTS, number_of_dataproducts: results.length})
+                my_dispatch({type: SET_STATUS_ADEX, status_adex: 'fetched (' + timeDiff.toString() + ' ms)'})
+                my_dispatch({type: ALADIN_RELOAD, aladin_reload: !my_state.aladin_reload})
+
+            } catch (error) {
+                if (error.name === 'AbortError') {
+                    console.log('Fetch was aborted');
+                    my_dispatch({type: SET_NUMBER_OF_DATAPRODUCTS, number_of_dataproducts: 0})
+                    my_dispatch({type: SET_STATUS_ADEX, status_adex: 'fetch aborted'})
+                } else {
+                    my_dispatch({type: SET_NUMBER_OF_DATAPRODUCTS, number_of_dataproducts: 0})
+                    my_dispatch({type: SET_STATUS_ADEX, status_adex: 'failed'})
+                }
             }
         }
-
     }
 
     // fetch a single primary dataproduct
     const fetchPrimaryDP = (url) => {
-
         if (my_state.status_primary !== 'fetching') {
 
             my_dispatch({type: SET_STATUS_PRIMARY, status_primary: "fetching"})
diff --git a/src/pages/benchmarking/ADEXBackendsPage.js b/src/pages/benchmarking/BenchmarkingPage.js
similarity index 94%
rename from src/pages/benchmarking/ADEXBackendsPage.js
rename to src/pages/benchmarking/BenchmarkingPage.js
index 75df875d50ae74d74466e5c62884a71cf5aa0ff6..e203414e318cf4c6340a62ec835ce89fef8fca12 100644
--- a/src/pages/benchmarking/ADEXBackendsPage.js
+++ b/src/pages/benchmarking/BenchmarkingPage.js
@@ -8,7 +8,7 @@ import LeftPanel from './LeftPanel'
 import Aladin from './AladinPanel'
 
 
-export default function ADEXBackendsPage(props) {
+export default function BenchmarkingPage(props) {
 
     const [ my_state, my_dispatch] = useGlobalReducer()
 
diff --git a/src/pages/skyview/SelectCollectionButton.js b/src/pages/skyview/SelectCollectionButton.js
index 24645485c1693681c169f7b4c036597268c14732..4fd6dbf8b7c80cc20b98be73ce2b6dca3473db94 100644
--- a/src/pages/skyview/SelectCollectionButton.js
+++ b/src/pages/skyview/SelectCollectionButton.js
@@ -17,6 +17,10 @@ export default function SelectCollectionButton() {
         my_dispatch({type: RELOAD_ADEX, reload_adex: !my_state.reload_adex})
     }
 
+    if (!my_state.collection) {
+        return null
+    }
+
     let renderDropdownItems
     if (my_state.backend_config) {
         if (my_state.backend_config.config) {
diff --git a/src/pages/skyview/FocusProjectPage.js b/src/pages/skyview/SkyViewPage.js
similarity index 94%
rename from src/pages/skyview/FocusProjectPage.js
rename to src/pages/skyview/SkyViewPage.js
index a52ecb591d85651c12dc793500ccf9048a0a1e0b..af645478e0d50679d74467170aac924fa7b50c1a 100644
--- a/src/pages/skyview/FocusProjectPage.js
+++ b/src/pages/skyview/SkyViewPage.js
@@ -8,7 +8,7 @@ import LeftPanel from './LeftPanel'
 import Aladin from './AladinPanel'
 
 
-export default function FocusProjectPage(props) {
+export default function SkyViewPage(props) {
 
     const [ my_state, my_dispatch] = useGlobalReducer()