I've created a couple of lightning components as well as a custom lightning event which is used in both components to talk to each other. The markup is as follows:

Lightning Event (Name : MYEVENTTYPE)

<aura:event type="COMPONENT" description="Event template" />

Component 1 (markup):

<aura:component implements="flexipage:availableForAllPageTypes" controller="FirstComponent">
    <aura:attribute name="showFirstComponent" type="Boolean" default="true"/>
    <aura:attribute name="selectedRecordId" type="String" default="" />     
    <aura:if isTrue="{!v.showFirstComponent == true}">
        <!-- First Component Body -->
        <aura:set attribute="else">
                <NS:SecondComponent recordId="{!v.selectedRecordId}" MYEVENT="{!c.EventFiredHandler}" />

Component 1 (controller):

EventFiredHandler : function(component, event, helper) 
    // some code here

Component 2 (markup):

<aura:component implements="flexipage:availableForAllPageTypes" controller="SecondComponent">
    <aura:registerEvent name="MYEVENT" type="MYEVENTTYPE"/>
    <!-- the rest of the body for the component which fires off the function in the controller "someFunction" -->

Component 2 (controller):

    someFunction : function(component, event, helper) {
        var cmpEvent = component.getEvent("MYEVENT");

All of the above bundles are included in an unmanaged package (Component 1, Component 2 and MYEVENT), which uploads successfully. However, when I try to install the package into another org (Summer '15 Sandbox with enabled lightning components), I get the aforementioned error.

Has anyone experiences such a problem before? What am I missing?


It turns out that I was missing the namespace when registering the event:

<aura:registerEvent name="MYEVENT" type="MYEVENTTYPE"/>

Should be:

<aura:registerEvent name="MYEVENT" type="NS:MYEVENTTYPE"/>

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