What does the Transporter warning "No NCX Extensions Document specified" refer to? The warning code is "ITMS-9011".
I received this warning from Transporter today while using it to validate an epub:
"...1 asset was validated successfully (with warnings):
9781408904664.epub
WARNING ITMS-9011: 9781408904664.epub : No NCX Extensions Document specified".
Transporter 1.7.8-OTHER, Windows 7