错误：拓扑无效 [无法打开缓存文件]

错误消息

尝试使用 Python 脚本运行融合工具失败，并返回以下错误：

错误：
拓扑无效 [无法打开缓存文件]

以下为代码片段示例：

logging.info("Merging layers")
arcpy.Merge_management(layersForMerge, mergeFC)
logging.info("Buffering merged feature class")
arcpy.Buffer_analysis(mergeFC, bufferFC, "30 Meters", "FULL", "ROUND", "NONE", "", "PLANAR")
logging.info("Dissolving buffer feature class (this may take a while)...")
arcpy.Dissolve_management(bufferFC, dissolvedFC, "", "", "MULTI_PART", "DISSOLVE_LINES")
arcpy.Delete_management(bufferFC)

原因

如果运行 ArcMap 的计算机内存不足，无法运行 Dissove_management() 工具，则会返回该错误。

解决方案或解决方法

为防止发生该错误，请清除融合工具的内存。 可以使用 Delete_management() 函数来删除先前占用内存空间的进程，并添加垃圾收集 Python 函数 gc.collect() 来释放内存，从而完成上述操作。 以下是用于执行此操作的代码片段示例：

logging.info("Merging layers")
arcpy.Merge_management(layersForMerge, mergeFC)
logging.info("Buffering merged feature class")
arcpy.Buffer_analysis(mergeFC, bufferFC, "30 Meters", "FULL", "ROUND", "NONE", "", "PLANAR")
logging.info("Dissolving buffer feature class (this may take a while)...")

arcpy.Delete_management(mergeFC)
gc.collect()
arcpy.Dissolve_management(bufferFC, dissolvedFC, "", "", "MULTI_PART", "DISSOLVE_LINES")
arcpy.Delete_management(bufferFC)