Encore CS6 "DualLayer: This disc requires a layer break" I am trying to create a dual-layer 8.5 GB DVD image.

It consists of an MPEG multiplexed video with audio and Encore chapter markers created in Premiere Pro CS6 and does not require transcoding in Encore, occupying about 1.69 GB of space.

I also have ROM content where I have two HD video files, with one of them 5.63 GB in size.

Now when I run Check Project, Encore does not show any warnings, however when I try to build the DVD image, it fails with the message

DualLayer: This disc requires a layer break


I have tried both the Automatic and the Manual layer break setting, and I do not see where and how I could set a manual break in Encore.

So, my question is, how do I make this work, what are my options ?
Is this issue because the 5.63 GB file cannot fit onto one layer (why would this even matter) ?
It looks like it is not possible to create a DVD DL with a ROM part that exceeds a layer's size.

So I created a 4 GB HD video (which also fits on a FAT32 file system) and created a DL disc with some GBs wasted space.

I tried to put another file onto the ROM part but this always fails as soon as the ROM part exceeds the layer limit, which is strange because DVD-ROM-only DL discs seem to work perfectly.