diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/PumpInterface.java b/app/src/main/java/info/nightscout/androidaps/interfaces/PumpInterface.java
index c9159e6177..2b413fbe43 100644
--- a/app/src/main/java/info/nightscout/androidaps/interfaces/PumpInterface.java
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/PumpInterface.java
@@ -16,6 +16,8 @@ import info.nightscout.client.data.NSProfile;
  */
 public interface PumpInterface {
 
+    boolean isInitialized();
+
     boolean isTempBasalInProgress();
     boolean isExtendedBoluslInProgress();
 
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java
index b6da667701..e3df07d326 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java
@@ -294,10 +294,15 @@ public class ConfigBuilderPlugin implements PluginBase, PumpInterface, Constrain
     }
 
     /*
-    * Pump interface
-    *
-    * Config builder return itself as a pump and check constraints before it passes command to pump driver
-    */
+        * Pump interface
+        *
+        * Config builder return itself as a pump and check constraints before it passes command to pump driver
+        */
+    @Override
+    public boolean isInitialized() {
+        return activePump.isInitialized();
+    }
+
     @Override
     public boolean isTempBasalInProgress() {
         return activePump.isTempBasalInProgress();
@@ -527,6 +532,13 @@ public class ConfigBuilderPlugin implements PluginBase, PumpInterface, Constrain
         request.rate = applyBasalConstraints(request.rate);
         PumpEnactResult result;
 
+        if (!isInitialized()) {
+            result = new PumpEnactResult();
+            result.comment = MainApp.sResources.getString(R.string.pumpNotInitialized);
+            result.enacted = false;
+            result.success = false;
+        }
+
         if (Config.logCongigBuilderActions)
             log.debug("applyAPSRequest: " + request.toString());
         if ((request.rate == 0 && request.duration == 0) || Math.abs(request.rate - getBaseBasalRate()) < 0.05) {
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/DanaR/DanaRPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/DanaR/DanaRPlugin.java
index d5d7966a56..5501319e99 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/DanaR/DanaRPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/DanaR/DanaRPlugin.java
@@ -150,6 +150,11 @@ public class DanaRPlugin implements PluginBase, PumpInterface, ConstraintsInterf
             this.fragmentPumpVisible = fragmentVisible;
     }
 
+    @Override
+    public boolean isInitialized() {
+        return getDanaRPump().lastConnection.getTime() > 0;
+    }
+
     // Pump interface
     @Override
     public boolean isTempBasalInProgress() {
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/MM640g/MM640gPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/MM640g/MM640gPlugin.java
index 6fd3ea5493..7361054a3e 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/MM640g/MM640gPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/MM640g/MM640gPlugin.java
@@ -94,6 +94,11 @@ public class MM640gPlugin implements PluginBase, PumpInterface, BgSourceInterfac
      * Pump Interface
      */
 
+    @Override
+    public boolean isInitialized() {
+        return false;
+    }
+
     @Override
     public boolean isTempBasalInProgress() {
         return false;
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/VirtualPump/VirtualPumpPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/VirtualPump/VirtualPumpPlugin.java
index a5f05acbc6..99508d2c7e 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/VirtualPump/VirtualPumpPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/VirtualPump/VirtualPumpPlugin.java
@@ -77,6 +77,11 @@ public class VirtualPumpPlugin implements PluginBase, PumpInterface {
         return PluginBase.PUMP;
     }
 
+    @Override
+    public boolean isInitialized() {
+        return true;
+    }
+
     @Override
     public boolean isTempBasalInProgress() {
         return getTempBasal() != null;
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9e05a98082..096df23039 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -339,4 +339,5 @@
     <string name="ns_upload_only">NS upload only (disabled sync)</string>
     <string name="ns_upload_only_summary">NS upload only. Not effective on SGV unless a local source like xDrip is selected. Not effective on Profiles while NS-Profiles is used.</string>
     <string name="ns_upload_only_enabled">Please deactivate "NS upload only" to use this feature.</string>
+    <string name="pumpNotInitialized">Pump not initialized!</string>
 </resources>