Unfortunately, it is not that simple. It involves examining the sesx in detail as well as interrogating each of the media files and applying a fair bit of math. It is not just the amount of media available to the clip (which can vary if a file needs to be resampled) but where in the clip the start of the media begins - looped clips are generally the culprit for that particular scenario. Another way is to try and create a 'reference' OMF (rather than an embedded/encapsulated OMF) and then see if PT opens it. PT will probably complain and then truncate the offending clips but it will produce an error report which should at least help you isolate the offending clips.
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