problem with SelectLayerByAttribute management in script

Question

My problem is that this tool works perfectly in IDLE or PyScripter programs, but if I use in the script in ArcGIS desktop this problem occurs: arcgisscripting.ExecuteError:ERROR 000582...

Why does it not execute in ArcGIS script but works in the programs?

The tool SelectLayerByAttribute management is inside the arcpy.da.UpdateCursor

This is my code:

import arcpy
import datetime
arcpy.env.overwriteOutput = True

territory= arcpy.GetParameterAsText(0)
path= arcpy.GetParameterAsText(1)
territory_lyr=  path+ "territorios_lyr"

arcpy.MakeFeatureLayer_management(territory,territory_lyr)
fields= ("FID", "avg_mindis", "I_conc", "Max_lenght","TamanoTerr")
with arcpy.da.UpdateCursor(territory,  fields) as cursor:
    for row in cursor:
        currentID= row[0]
        where= "FID="+str(currentID)
        arcpy.SelectLayerByAttribute_management(territory_lyr, "NEW_SELECTION",where)

Answer 1

At this point, the problem with your where clause is that it will be interpreted as (assuming FID = 1 what you should have is "FID" = 1 (or [FID] with personnal geodatabase), therefore the python command need to be

' "FID" = ' + str(row[0])

Remark : It is a bit strange to create a layer inside a cursor, especially with FID's which are ranked suites of integers and relying on the same feature class, but you probably have good reasons in the remaining of your code. Maybe if you give more details about the rest of your code (in another question), a better solution could be provided. For instance you could immediately work with the geometry from your cursor, or create your layer in a loop like this :

for i in range(int(arcpy.GetCount_management(territory_lyr).getOutput(0)) ):
    arcpy.SelectLayerByAttribute_management(territory_lyr, "NEW_SELECTION",'"FID" =' + str(i) ) #maybe i + 1 depending of your input type