Calling custom method of other layer objects created in form level in D365

 Hi,

Using an event handler, we cannot call the custom methods created in another later / model/ ISV object. 

On calling formRun.CreateDeliveryNote()  throws the error ‘FormRun doesn't have the method CreateDeliveryNote.

FormDataSource purchTable_ds = sender.datasource();
FormRun formRun = purchTable_ds.formRun();
formRun.CreateDeliveryNote() ;

Conclusion is to use only COC not eventhandler

[ExtensionOf(formDataFieldStr(PurchTable, PurchTable, DeliveryDate))]
final class PurchTableDeliveryDateField_Extension
{
    public void modified()
    {
         next modified();
         element.CreateDeliveryNote(); // Custom method from Other Later / Model 
    }
}

Regards