After completing a PVA project involving nearly 5,400 pics, I was left with a table of 50 invalids (quite a feat, given the number of photos taken!). By bracketing the last and next good photo by file numbers I can narrow down where the invalids were taken. I can then create features for those locations and drop a point on the structures that did not have vaild photos attached. My question is, can those points then somehow be joined to the invalid photo files?