[ORD 2019R1] End area volumes

Hi, I'm having trouble getting an output with end area volumes report. I'm comparing two terrain surfaces rather than a corridor but can't see that would be a problem, the cut/fill mesh looks fine. I'm working in the following sequence and can see that an XML section is added to the named boundary properties.

1. label terrain surfaces with exisiting and proposed feature definitions
2. Create cut fill mesh
3. Create named boundary cross sections
4. End area volumes report (selecting named boundary set made in step 3)

I even get a correct read out on the Volume.xls report - This would actually be sufficient but I want to place an EAV annotation on my drawing XS sheets and that takes values from the EAV report