I'm trying to manually edgematch some adjacent polygons. When I try to add a vertex to snap it to another vertex on an adjacent polygon, it invariably undoes itself, as shown in this video that I made demonstrating the problem (I couldn't figure out any way to post it here since it is not an image so the best I can do for now is a link).
There are 2 vertices in the beginning and I add a third. It is actually removing one of the 2 vertices on the right side and putting the result in the middle. It must be a tolerance of some sort but I tried changing it from 10 pixels to 5 (or 3 or 1) pixels and zooming way in and the problem still occurs (it just becomes more difficult to find the snap point). Is there any other setting I could modify to force the added vertices to snap without moving the other placed vertices?
Answer
I found the solution interesting (and a little bit funny). I worked with ESRI Support on this yesterday (I finally decided I needed to finish these edits) and the first thing they had me try was to open a blank MXD and copy the parcels layer over into the blank project. I started an EDIT session and everything snapped into place right away! I didn't get a great explanation as to how the MXD affects editing (I assumed it would NOT ... but it DOES!). The analyst said something to the effect of "the project can only keep so many edits". It doesn't make a lot of sense but I suppose it "just is".
I have had trouble running geoprocessing tasks inside of an MXD project file in the past and I always suggest this to people having issues with a tool in the toolbox. I just had not considered that it extended to edit sessions.
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