The Multiple Ring Buffer tool generates unexpected output when more than two distances are specified and the dissolve option is set to “ALL” (ArcView and ArcEditor license level only).
Modifying the codeblock in line 157 of <a href="http://MultiRingBuffer.py" target="_blank">MultiRingBuffer.py</a> corrected the behavior. This was confirmed, but extensive testing was not done.Replace:codeblock = '''def pullDistance(distL, *fids):return min([i for i, j in zip(distL, fids) if j != -1])'''With:codeblock = '''def pullDistance(distL, *fids):return min([i for i, j in zip(distL, fids) if j == 1])'''