Dynamics Community Forum Thread Details

Unable to get property 'then' of undefined or null reference

Hello everyone,

I have an error happens at Xrm.Page.data.save(saveOptions).then(successCallback, errorCallback) function.

My situation is like following:

I have a plugin that checks for some business rule at (Service Appointment) form.
Business Rule is to prevent any user of creating new (Service Appointment) if he is already have another (Scheduled) one.
I created the plugin as (PreCreate) to run before save new (Service Appointment)
Plugin working normally, and throw (InvalidPluginExecutionException) when business rule is violated
Now I wrote a JavaScript to handle (InvalidPluginExecutionException) to show error message as a Form notification using ( Xrm.Page.ui.setFormNotification)
I attached that new JavaScript to (Service Appointment) Form to be fired (OnSave) event.
Following code clarify the JavaScript code

function StartSave() {
    //========================================================
    //Clear old notifications
    Xrm.Page.ui.clearFormNotification();

    //Save Form data
    Xrm.Page.data.save().then(SuccessCallback, ErrorCallback);
}