Read-Error.
Format error discovered in the file in sub-document content.xml at 2,82247(row,col).
This is the error message I get when I try to open my file. Please help. This is a 26 page document!! I was able to get it to open in another program but only the first 6 pages. I am assuming up to the error line.
Change the extension to .zip, open the archive, open the file content.xml in a plain text editor (NOT Writer). Maybe it was truncated, then the rest of the document is lost. Or you have some bad xml there that needs to be fixed. When you are done editing the xml, save it and drag the saved file in the archive, then change extension back to .odt.
Alternatively, register at Index page • Apache OpenOffice Community Forum and post in How did I fix my ODT file.