problems.....

Hi guys

 these days i try to install gift,and i have some troubles

1   when i index a collection folder first time , Gift can successfully do
it, when i index this folder again or add some images and index second time
,

i found this error , just when i index a folder again this error show..... i
try many times


2 i create a new folder,add 4 normal images ,and a pdf file. then i chang
the suffix .pdf to .jpg

 gift can index this folder without any errors.......   why ..


Thanks for your help

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