Make sure you have saved your project and if the master page still isn't there, close the project and rename its .CPD file. If that still doesn't work, I'd try creating the master page from scratch. There is obviously something inside the old template that is causing RH to choke. Recreating it may be the easyiest option.
I have tried importing the master page many times and it doesn't work. The only way for me to edit the master page is to import it and then it appears in the RoboHelp Editor where I can edit it.
I renamed the cpd and that didn't help.
I created a new Master Page (which does appear in the Project Set-up pane), assigned the new Master Page to all topics. I deleted the old Master Page (which is named functions.htt). I then tried to rename the new one with the name functions.htt, but I get the message - "The name funcions.htt is already in use by a file or a folder".
I'd rather not use a new Master Page name, because in some of my projects it appears 1,000s of times.
I can't send the entire project (company policy). However, I found that in a smaller project the same template is appearing.
So, I'm trying to isolate the problem.
I'll post back when I find something.
Thanks for all your help.
By the way, I just now saw that there was a similar problem reported for RoboHelp 7 in a post entitled:
Jan 15, 2008 7:03 PM Topic templates not importing to Robo 7 successfully
I have the very same problem. (Also using Robo8) My master page list is empty, even though every topic in the project is using the same template. When I try to import the template from another project, it says it already exists. When I look for it using Explorer, I can easily find it. So, basically I am unable to modify the master page because it won't show up in the Project Set-up pod. I have multiple projects using the same template, so I don't want to create a new one from scratch and apply to every topic. But right now I don't see an alternative.
Hello and welcome to our community
One way to overcome this is to save the Master Page file using a variation on the file name. Then import it into the project and associate the new Master Page with all the topics.
This is easily done using the Topic List.
Helpful and Handy Links
Even though it does not appear in the Project Set-up pane, you can still modify it.
Import the Master Page (File > Import > Master Page), and the Master Page should appear in the Topic view, where you can modify it.