diff --git a/base.py b/base.py
index 6f4438d..c0eb505 100644
--- a/base.py
+++ b/base.py
@@ -93,9 +93,9 @@ class Client(HandlerBase):
             result = node.handle_command(command)
             if result is not None:
                 break
-        if isinstance(result, str):
+        if isinstance(result, dict):
             return dict(type='accept-command', result=result)
-        return dict(type='accept-command')  # TODO: how to handle result is None?
+        return dict(type='accept-command')
 
     def info(self):
         return ["na"]
diff --git a/client/cssFiles/SEAWebClientGroup.css b/client/cssFiles/SEAWebClientGroup.css
index 5b5c8eb..6fe5ba7 100644
--- a/client/cssFiles/SEAWebClientGroup.css
+++ b/client/cssFiles/SEAWebClientGroup.css
@@ -48,7 +48,7 @@
 }
 
 .row-waiting-for-answer {
-	background-color: orangered;
+	background-color: LightGoldenrodYellow;
 }
 
 /* ------------------------------ icon-modules ------------------------------ */
diff --git a/client/jsFiles/SEAWebClientCommunication.js b/client/jsFiles/SEAWebClientCommunication.js
index 5974359..7634c7b 100644
--- a/client/jsFiles/SEAWebClientCommunication.js
+++ b/client/jsFiles/SEAWebClientCommunication.js
@@ -277,13 +277,12 @@ function updateValue(component) {
     for (var j = 0; j < matches.length; j++) {
         let elem = matches[j];
         let type = elem.__ctype__; // -> Show Dom-Properties
-        if (type == "rdonly" || type == "none") {
+        if (type == "rdonly") {
             let text = htmlEscape(component.formatted);
             if (text) {
                 elem.innerHTML = text;
             }
-        }
-        else if (type == "input") {
+        } else if (type == "input") {
             let row = elem.closest('div');
             row.classList.remove('row-waiting-for-answer');
             elem.actualValue = component.value;
@@ -306,10 +305,10 @@ function updateValue(component) {
             //         elem.value = j + 1;
             //     }
             // }
-            elem.value = component.value;
-            console.log('update pushbutton');
-            console.log('component.name:', component.name);
-            console.log('element', elem);
+        } else if (type == "none") {
+            // pushbutton (e.g. stop command)
+            let row = elem.closest('div');
+            row.classList.remove('row-waiting-for-answer');
         }
     }
 }
@@ -468,6 +467,12 @@ function successHandler(s, message) {
     // Response to a "updategraph"-server-request.
     case "accept-graph":
         break;
+    case "accept-command":
+        console.log('ACCEPT', message.result)
+        if (message.result) {
+             updateValue(message.result);
+        }
+        break;
     case "error":
         console.log("%cError-Message received!", "color:white;background:red");
         console.log(message);
diff --git a/client/jsFiles/SEAWebClientGroup.js b/client/jsFiles/SEAWebClientGroup.js
index 30ca0a1..2df49e1 100644
--- a/client/jsFiles/SEAWebClientGroup.js
+++ b/client/jsFiles/SEAWebClientGroup.js
@@ -223,7 +223,12 @@ function createValue (component) {
         value.classList.add('col-right-value-with-write-permission');
     }
     value.setAttribute('name', component.name);
-    value.__ctype__ = 'rdonly';
+    if (component.type == 'pushbutton') {
+        console.log('CREATE', component.name);
+        value.__ctype__ = 'none';
+    } else {
+        value.__ctype__ = 'rdonly';
+    }
     return value;
 }
 
diff --git a/secop.py b/secop.py
index 51ff6a2..471c2b3 100644
--- a/secop.py
+++ b/secop.py
@@ -150,17 +150,17 @@ class SecopInteractor(SecopClient):
         if module not in self.modules:
             return None
         logging.info('SENDCOMMAND %r', command)
-        try:
-            if is_param:
+        if is_param:
+            try:
                 entry = self.setParameterFromString(module, parameter, strvalue)
                 item = {'name': f'{module}:{parameter}', 'value': str(entry), 'formatted': entry.formatted()}
-                self.updates[module, parameter] = item
-                result = True
-            else:
-                result = self.execCommandFromString(module, parameter, strvalue)[0]
-        except Exception as e:
-            print(f"{e!r} converting {strvalue} to {self.modules[module]['parameters'][parameter]['datatype']}")
-        return result
+            except Exception as e:
+                print(f"{e!r} converting {strvalue} to {self.modules[module]['parameters'][parameter]['datatype']}")
+            self.updates[module, parameter] = item
+            return True
+        # called a command
+        result = self.execCommandFromString(module, parameter, strvalue)
+        return {'name': f'{module}:{parameter}', 'value': str(result), 'formatted': result.formatted()}
 
     def get_updates(self):
         updates, self.updates = self.updates, {}