Hi all,

A friend has been taking the panos, putting them on her mac and then giving 
them to me on a flash drive. All has been well and I have stitched dozens 
of panos this way. She recently got a windows computer and sent me a new 
batch of photos to make panos out of and now I am getting this error a lot 

ContractViolation: Precondition violation! Unable to open file 

when I run the control point detector or send it to the assistant. This 
happens when I run hugin 2012 on windows 7

If I select a few and have it find control points it will do it. It is when 
I ask it to do more than a certain number (about 10) that the problem shows 
up.

Looking on here when people have the problem either no one has an answer, 
they are scripting and messing up or it is the extif data.

That got me wondering what is the difference?
Here is a copy that was put from the memory card directly to windows (when 
I work with it these there are lots of problems that I have not seen before)
http://www.kvtours.com/p/source/test/485.JPG
Same image but was removed from memory card with a mac then put on my 
windows with a flash drive. A full pano of these stitches just like I 
normally expect them to with no errors.
http://www.kvtours.com/p/source/test/DSC_0073.jpg

Here in a few minutes I will try my 2013 version and see if I have better 
luck. Even if it does work I am wondering why the problem and if there is a 
way around it(I like the older interface better as that is what we had when 
I started so if possible I would like to keep using what has been working.)

Thanks,

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