Pixel map preview different than wall

did you turned the Server to full?

And are the fixtures, that you have patch to your Pixelmap also Patched as regular Fixture in Patch?
If yes than maybe you should have a look at Crosfade at your server. This is switching between the regular Patched side and the Pixelmap side.

I do have the server at full.

I hadn't tried crossfade before, it didn't solve this issue but it did help with another problem I am having.

I am able to see the prebuilt files on the wall with no issues, it just seems to be the files i have built that don't work. 

are you allowed to share your file?
Maybe you send it as a message. And i will have a look at it.

Are you using a primary and backup device (ie: console and RPU)? If so, have you put the graphic content on the primary? If the RPU is primary and you're programming on the backup, it's easy to miss putting content on both devices.

That was it, completely slipped my mind that the primary master would need the file as well. 

Thank you