This might be the wrong place to hope for an answer but you guys have always been great in the past.

I am trying to open an xml file in Excel. Long story short once it is in it gets processed to allow a quick way to look for certain references. I've done 3 files so far and no problem. After about 6 months I'm not back doing the same again with a new file. This file (as far as I know) uses all the same definitions etc but when I go to import it I get a warning telling me the XML map is corrupt. The full error is attached. Does anyone have any ideas as to what the issue may be and how to fix it? I cut and paste it into the W3 XML validator and it passed ok.

TIA
xml corrupt.JPG