Jag skulle validera raderna som orsakar fel genom ett externt skript - säg en snabb powershell. Till exempel
$data = @(Import-Csv .\partialFile.csv )
$row = $data[0]
# how many columns do we have?
$row | gm -membertype NoteProperty | Measure-Object
# columns larger than 80 chars
$row | gm -membertype NoteProperty | ? { ($row."$($_.Name)").Length -gt 80 }