Error in "River Rail Road"

[wb2001]

Downloaded the route, and had an error when I opened the route in Surveyor.

Product Queue.CreateProduct>null product
Stack dump:
function$iInt@ProductQueue::Create Product (asset,int)line1
function$Int@ProoLars:Test Size(asset)line2007
function$VOID@MeshObject::Int (asset)line254

What does this mean? I can browse the route, but it's annoying.

[StorkNest]

Way I read it, some industry is having problems creating product.
Checked your JetLog file? Might have kuid # of problem item.