hichiu,
hichiu wrote
> It works really great for my first signing without annotation modified
> warning. But here comes another problem discovered... when i made the
> second signing and annotation by the same code, the annotation modified
> warning appear again for the annotation added after first digital sign.
> blank_2.pdf
> <http://itext-general.2136553.n4.nabble.com/file/n4659447/blank_2.pdf>
You use the same /NM values ("a" and "aa") for the two annotations added
during your second signing as for those two annotations added during the
first signing.
As the /NM value is defined as "The annotation name, a text string uniquely
identifying it among all the annotations on its page," those identical /NM
values constitute an error which Adobe Reader fixes by changing some of
these values to unique new strings.
Thus, use unique names, e.g. by resorting to guids like Adobe does.
Regards, Michael
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