calculate length with the filed calculator in model builder arcgis 10

Discussion created by acoana on May 8, 2011
Latest reply on May 8, 2011 by acoana
Hi, I try to use the calculator field to update a field that store lengths in a shapefile; I do this because I try to put the task in model builder. I use python under suggestion of what I read in the help and the syntax I read for this task is as follow:


I fill the text box of the field calculator with this line of code, but it`s return a syntax error.

Someone knows what it´s wrong ? I work under Windows XP, ArcGis 10, ArcEditor evaluation version.