关于建立缓冲区失败，急救啊~

geotoki

在一层要素中，比如一个水系，对总体建立一个三圈的缓冲区没有问题，但是对单独提出几种要素建立缓冲区却显示失败：
Start Time: Wed May 30 01:02:22 2012
Running script MultipleRingBuffer...
GP ERRORS:
ERROR 999999: Error executing function.
An error occurred during the buffer operation
Failed to execute (Buffer).

PYTHON ERRORS:
Traceback Info:
  File "<string>", line 164, in multiringbuffer
Error Info:
    <class 'arcgisscripting.ExecuteError'>: ERROR 999999: Error executing function.
An error occurred during the buffer operation
Failed to execute (Buffer).

ERROR 000227: Cannot Multiple Ring Buffer
请问是怎么回事？

龙套甲

感谢分享