A colleague has developed a workbook with long paragraphs in each cell of a
column he wishes to autofilter. I know there is a limit of 1000 cells that
autofilter will read but there are only about 180 cells in the column. The
autofilter only returns 50-60 cells.

On the other hand the cells often contain over 200 characters, and some
contain 700-1000 characters, so I feel that there must be a limit that is
being overtaken in this workbook. If I delete most of a cell content it will
be added to the autofilter list, and if I lengthen it again it disappears,
but I cannot see why.

Please would someone suggest where precisely this is going awry?