Error Message ERROR 999998: Unexpected Error Failed to execute

[chukwuemekaobilor]

Hey guys, i am some how new to python programing.  I created a sript that selects a polygon tile/grid and uses the tile to clip all data feature classes  in the tile.  The cliped data will then beconverted into a dxf and dropped in a folder.  But when I batch the process so it could go over 5 or more grids, it stops at the second grid and gives me this error message.  Any help will be appreciated.  (See code below)


import sys, arcgisscripting
gp = arcgisscripting.create()
gp.AddToolbox("C:/Program Files/ArcGIS/ArcToolbox/Toolboxes/Conversion Tools.tbx")
gp.AddToolbox("C:/Program Files/ArcGIS/ArcToolbox/Toolboxes/Data Management Tools.tbx")
gp.AddToolbox("C:/Program Files/ArcGIS/ArcToolbox/Toolboxes/Analysis Tools.tbx")
gp.overwriteOutput = 1

#grid feature class
gridFC = gp.getParameterAsText(0)
#gdb holding all feature classes to be clipped
mapNo = gp.getParameterAsText(1)
inputGDB = gp.getParameterAsText(2)


#final output folder
outputFolderRoot = gp.getParameterAsText(3)
#list of feature classes


gp.Extent = "1336418.000000 556751.000000 1504418.000000 748751.000000"
exportNames = ['Building','Contours','Rec','Communication_Towers','Cultural','Rail','Road','Transmission','Vegetation']
gridCursor = gp.searchCursor(gridFC, "MAPNO = '" + mapNo + "'")
currentGrid = gridCursor.next()

scratchGDB = outputFolderRoot + "\\Scratch.gdb"
if gp.Exists(scratchGDB):
    gp.Delete_management(scratchGDB)
   
gp.addMessage("Creating scratch database...")
gp.CreateFileGDB(outputFolderRoot, "Scratch.gdb")

currentMapNo = currentGrid.MAPNO
gp.CreateFolder_management(outputFolderRoot, currentMapNo)
outputFolderName = outputFolderRoot + "\\" + currentMapNo
whereClause = "MAPNO = '" + currentGrid.MAPNO + "'"
currentClip = scratchGDB + "\\currentGridClip"

#create clipped map to use to clip all feature classes
gp.addMessage("Selecting MAPNO = " + currentMapNo)
gp.Select_analysis(gridFC, currentClip, whereClause)
for exportName in exportNames:
    gp.addMessage("Clipping " + exportName + " for MAPNO = " + currentMapNo)
    inputFC = inputGDB + "\\" + exportName
    if gp.Exists(inputFC):   
        inputAnno = inputFC + "_Anno"
        outputClipName = scratchGDB + "\\" + exportName + "_" + currentMapNo
        outputDWGName = outputFolderName + "\\" + exportName + "_" + currentMapNo + ".DWG"
        try:
            gp.Clip_analysis(inputFC, currentClip, outputClipName)
            if gp.Exists(outputClipName):
                if gp.Exists(inputAnno):
                    #include anno if it exists
                    outputClipAnnoName = scratchGDB + "\\" + exportName + "Anno_" + currentMapNo
                    gp.addMessage("Clipping " + exportName + "Anno for MAPNO = " + currentMapNo)
                    gp.Clip_analysis(inputAnno, currentClip, outputClipAnnoName)
                    exportParameter = outputClipName + ';' + outputClipAnnoName
                    gp.addMessage("Converting " + exportName + " to CAD...")
                    gp.ExportCAD_conversion(exportParameter, "DWG_R2000", outputDWGName, "Ignore_Filenames_in_Tables", "Overwrite_Existing_Files", "")
                else:
                    #skip anno
                    gp.addMessage("Converting " + exportName + " to CAD...")
                    gp.ExportCAD_conversion(outputClipName, "DWG_R2000", outputDWGName, "Ignore_Filenames_in_Tables", "Overwrite_Existing_Files", "")
        except:
            gp.addMessage("Clipping of " + exportName + " failed.  Moving on.")

hydroLine = inputGDB + "\\Hydrology_Line"
hydroPoly = inputGDB + "\\Hydrology_Poly"
outputDWGName = outputFolderName + "\\hydro_" + currentMapNo + ".DWG"
gp.addMessage("Converting hydro to CAD...")   
if gp.Exists(hydroLine):
    if gp.Exists(hydroPoly):
        #both poly and line exist
        exportParameter = hydroLine + ';' + hydroPoly          
        gp.ExportCAD_conversion(exportParameter, "DWG_R2000", outputDWGName, "Ignore_Filenames_in_Tables", "Overwrite_Existing_Files", "")
    else:
        #if line exists but not poly
        gp.ExportCAD_conversion(hydroLine, "DWG_R2000", outputDWGName, "Ignore_Filenames_in_Tables", "Overwrite_Existing_Files", "")
else:
    #line does not exist
    if gp.Exists(hydroPoly):
        #poly exists, but not line
        gp.ExportCAD_conversion(hydroPoly, "DWG_R2000", outputDWGName, "Ignore_Filenames_in_Tables", "Overwrite_Existing_Files", "")
       

gp.Delete_management(scratchGDB)