I am using ArcCatalog 10.0 and trying to snap a set of points to another layer that has roads in it. The points represent 10th miles along the road.

Here are the general steps for what i am doing:

  1. create a new local geodatabase
  2. copy my points and road layers into new GDB via copy/paste.
  3. double click the snap tool in toolbox -> Editing tools
  4. enter points layer as "input features", and line layer as "Snap environment".

These steps result in this error:

ERROR 000800 The value is not a member of END | VERTEX | EDGE.

I have googled all over and read all the docs I could find on the ESRI site, but i can't make sense of what this error is telling me to do.

Does anyone have any ideas?

I also tried to create a buffer layer from the line layer using toolbox -> Analysis tools -> Proximity -> buffer and using that in the "snap environment" paramater, but i get the exact same error.

I suspect my line layer is in the wrong format, but I am stumped on my next steps.

  • Is it possible to share a portion of your line and point, let me try that.. Because i am not able to replicate or any document on this error code. Could you try with exporting the point and line features into the file geodatabase. I didn't understand "new GDB via copy/paste".
    – user4666
    Commented Oct 31, 2011 at 20:41
  • i just now created a fresh geodatabase. I right clicked both layers and did an "Export -> To geodatabase (single)", and sent them to the new feature dataset in the new geodatabase. I get the same error when trying to snap.
    – clarson
    Commented Oct 31, 2011 at 21:08

4 Answers 4


Just encountered this myself. Got it working by putting an extra set of brackets [] around my env settings. The Arc help example is misleading because they use two sets of env settings, each defined in a variable with brackets, and then they nest these variables inside brackets.

Here is the code that wasn't working:

maxDist = str(maxDist + 1) + " Meters"        

...and the code that is working:

maxDist = str(maxDist + 1) + " Meters"        

I know this is a year old, but I figured out the easy way. It will give you that error no matter what shapefile you bring in as the snap environment. You need to select a type of snapping from the drop down menu and enter a distance tolerance next to your file where it comes up underneath the snapping environment. Hope this helps someone!!


I got this error message as well but continued to fill in the TYPE and DISTANCE in the box below the Snap Environment and it worked despite the error message. A bug perhaps?

  • Could you mention which version of ArcGIS you are using?
    – Paul
    Commented Apr 7, 2016 at 16:26

I had success closing all mxds (and/or ArcCatalogues) and opening a blank mxd containing only the files I wanted to snap.

That said, I also switched to an ArcInfo Licence when this worked.

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