[moonmyst532]

I'm converting a txt to epub for LULU. I get this when I try to validate the finished file. Could someone tell me what it means and how to fix it?
thanks

Flow Blue 013111 - Unknown.epub is not valid or contains warnings!

ERROR: Flow Blue 013111 - Unknown.epub/content.opf(7): attribute "file-as" from namespace "http://www.idpf.org/2007/opf" not allowed at this point; ignored
ERROR: Flow Blue 013111 - Unknown.epub/index_split_000.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_001.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_002.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_003.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_004.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_005.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_006.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_007.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_008.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_009.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_010.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_011.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_012.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_013.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_014.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_015.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_016.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_017.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_018.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_019.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_020.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_021.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_022.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_023.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_024.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_025.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_026.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_027.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_028.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_029.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_030.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_031.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_032.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_033.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_034.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_035.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/index_split_036.html(5): unfinished element
ERROR: Flow Blue 013111 - Unknown.epub/titlepage.xhtml(14): bad value for attribute "preserveAspectRatio"
Check finished with warnings or errors!