[ZippPress]

Hi I'm working on my first epub and I have a working cookbook that originated out of InDesign CS6. When I go to validate it through idpf epub validator I get this code.
'toc_marker-3': fragment identifier is not defined in 'OEBPS/129660-3_HighAltBaking-epub-7.xhtml'

I'm not a code geek and I could really use your help. I've tried to figure out what this means for days with no luck. I'm so frustrated.
Can you please help me!!!
thanks so much