Use Own .Master file - Return Code: 0?

I'm having one hell of time trying to import a custom master page for use in SI4. Every attempt when using "use your own .master file" fails, throwing a JS alert error "Return Code: 0"...

I've followed the SI4 Designers Guide to using custom master pages at: 

http://www.sitefinity.com/4.0/documentation/designers-guide/creating-a-template/creating-a-template-using-master-pages.aspx

Any help would be great. I checked the Error log and see nothing specific to this.

Thanks,
Matt

There isn't a lot to it.  

1.  Create a Master Page
2.  Create a new Page Template in Sitefinity
3.  Select to use an existing Template
4.  Select from your Master Page
5.  Done

When getting vague errors, I recommend simplifying everything until the error goes away, then begin re-adding code until it breaks again.

Create a brand new master page, do nothing with it and add it to Sitefinity.  Does this work?

If so, start re-adding code from your custom Master page bit by bit until it breaks again.  This will hopefully help you identify what the problem is.

Gabe Sumner
Telerik | Sitefinity CMS

Weird, this worked flawlessly on my first attempt today. 

Thanks,
Matt

Matthew/Gabe,

We have received the "Return Code: 0" error as well.  For us it is impossible to change an existing Template to a different Maser Page.  We can create a new Template and select a Master Page.  Whenever we need to change a Master Page, we have resorted to deleting a Template and remaking it.

Also, anytime we rename a Template there are errors and breakages abound.  Especially if we rename a Template that other Templates are based upon.

Hi Dan,

I'm not able to reproduce "Return code 0" error. Did you receive this error message every time you try to select a Master Page? Maybe you can describe some steps to reproduce or send me a video.
You can also give a try on our demo - demo.sitefinity.com/Home.aspx

According to your problem with changing existing Template to a different Master Page I logged it as a bug with id 106589. I can suggest you a workaround. When you are creating a template select "Don't use template (start from scratch)", then use Actions > Base template and select your master page. After that you will be able to change this master page with another.

I think you should not have any problems renaming a template, can you provide more information about this errors you receive, any screenshots or examples would be nice. Thank you in advance!