P: import "Don't import suspected duplicates" fails with originals prior to 2001/01/01-00:00:00

[FeedbackCommunityMember]

In Lightroom 3.6, the import option "Don't import suspected duplicates" does not work with old files (year 2000). Here you find test-data:

http://www.thavis.com/downloads/2012-...
http://www.thavis.com/downloads/2012-...
http://www.thavis.com/downloads/2012-...

Regards
Peter

[helen_gossweiler]

I did some testing on this issue and found the following to be true:

• 
  
• any image with a date/time original prior to 2001/01/01-00:00:00 will show this symptom (i.e. duplicates not being recognized)
• 
  
• The colum "importHash" in table "AgLibraryFile" shows a negative time stamp for date/time original < 2001/01/01-00:00:00
  (i.e. -22136634:04190019.JPG:1298237)
• 
  
• Timestamp in importHash is "-1" for 2000/12/31-23:59:59, and "0" for 2001/01/01-00:00:00
• 
  

It looks like the negative timestamp values in importHash seem to confuse the duplicate detection process.

Beat

[J453]

This is fixed in Lightroom 5 and later.