Mystery locks on feature classes

Discussion created by kalley on Jun 11, 2013
Latest reply on Jun 17, 2013 by thanos_cp78
I have a short geoprocessing script with an arcpy.Delete_management() line that keeps throwing a lock error:  "ERROR 000464: Cannot get exclusive schema lock.  Either being edited or in use by another application."

Details: (code pasted below too)
I can successfully delete "lrs_buffer" if I skip the lines of code defining the mxd and the layers.  However, I can't think of why there would be a lock on "lrs_buffer" due to creating the map document object, since "lrs_buffer" had never been added to the mxd.  Also, if I'm using a file geodatabase as a workspace and observe through Windows Explorer, no lock files for "lrs_buffer" are created in this workflow.  I am having the same problem if I use a personal geodatabase as my workspace.

import arcpy
arcpy.env.overwrite = True
workspace = r"V:\Projects\Shared\RouteLogSystem\ArcGIS_10_Prototype\Prototype_V10\rtlogptsQAQC\RouteLogPointsQAQC.gdb"

rtlogpts = arcpy.mapping.ListLayers(mxd, "*rtlogpts")[0] #feature class on SDE
lrs = arcpy.mapping.ListLayers(mxd, "*lrs_route_twn")[0] #feature class on SDE
rdsmall_copy = arcpy.mapping.ListLayers(mxd, "rdsmall_arc")[0] #feature class in workspace

bufferFC = "lrs_buffer"
if arcpy.Exists(bufferFC):
arcpy.Buffer_analysis(lrs.dataSource, bufferFC, "2 Meters", dissolve_option = "ALL")

Any ideas about what is happening?