Problem with derivatives. Error while using "convert"

[Matías Butelman]

Hi. I'm having a problem with all the derivatives: they don't show up. 

First, when regenrating derivatives, each processed item showed an error. That error was fixed by modifying the policy file as suggested in this thread: https://groups.google.com/d/msg/ica-atom-users/AwNUifxWsS4/BvfV6x9uBQAJ.

But thumbnails still fail to show. 

I tried generating one manually by using the following command:

convert -thumbnail 0x0 -background white -flatten -quality 75% 'example.pdf'['0'] thumbnail.jpg

This is what i got:

   **** Error: File has insufficient data for an image.
               Output may be incorrect.

Any help will be greatly appreciated 

[Dan Gillean]

Hi Matías,

Is this only happening with PDFs, or are you experiencing this issue with derivatives for all file types? 

Have you tried examining these PDFs in a PDF editor? Searching online, it seems that this error is returned by imagemagick/ghostscript most commonly when the source PDFs are corrupt in some way. Do you have a PDF you know to be valid that you can test with?

Otherwise, can you tell us more about your installation environment? Such as: 

• What version of AtoM do you have installed?
• Did you follow our recommended installation instructions?
• If yes, are you using Ubuntu 14.04 or 16.04?
• If no, what changes have you made?
• What version of Imagemagick do you have installed?
• You should be able to determine this by running convert -version from AtoM's root installation directory
• Have you upgraded recently, or made other changes in your installation environment? What first prompted this error?

Once we have a bit more info, hopefully I can get some suggestions from our team. 

Cheers, 

Dan Gillean, MAS, MLIS
AtoM Program Manager
Artefactual Systems, Inc.
604-527-2056

@accesstomemory

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