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Woohoo! that did the trick. Thanks!

In what version?
ExamDiff Pro 3.5.1.0

What do you get when you compare your files?
The exact message I get when comparing the two folders containing the large file and it's copy is "Out of memory while trying to allocate 453356386 bytes: Not enough space". If I try comparing just the two files ...

Go to Options | Misc | Messages and check both "Message about identical binary files" and "Message about different binary files", then try comparing your files. This will perform block-by-block comparison and use very little memory.
I tried checking "Message about identical binary files" (already ...

The only thing you can get for these files is the fact that they are either identical or different.
That's all I need; how do I do it? Or are you saying if I press the Ok button (rather than the Cancel Comparison button) when the error is displayed, it continues the comparison uninterrupted or ...

I am having the same or a similar issue when using ExamDiff Pro 3.5.1.0, however I do not have the option of changing the Comparison Block Size away from 1, as I need to do a byte-for-byte comparison to verify a folder copy is identical. I will never need to know what the actual differences are ...