arcgis 10.0 自定义脚本工具能正常运行一次，第二次就arcgis奔溃，程序重新打开就又能运行一次，这种问题您见过吗？有什么解决办法吗？

脚本是个简单的批量处理
fclist = arcpy.ListFeatureClasses("", "Line")
outfc = ""
if ".gdb" in inpath and ".gdb" in outpath:
for fc in fclist:
outfc = outpath + "\\" + fc + "_topolygon"
if arcpy.Exists(outfc) == False:
results = arcpy.FeatureToPolygon_management(fc, outfc)