-To remove Service Pack 1 you must uninstall ArcGIS desktop and reinstall.-Modify the <a href="http://MultiRingBuffer.py" target="_blank">MultiRingBuffer.py</a> script1. Through Windows explorer go to <a href="file:C:/Program" target="_blank">C:\Program</a> Files\ArcGIS\ArcToolbox\Scripts.2. Make a backup of the <a href="http://MultiRingBuffer.py" target="_blank">MultiRingBuffer.py</a> script.3. Right-click the scipt, select properties, uncheck the "Read-only" option.4. Edit the script and change line 171. Add an "s" to "lsDistance". From: GP.CalculateField("xxxxLyrTmp2", fieldName, lsDistance[x+1]) To: GP.CalculateField("xxxxLyrTmp2", fieldName, lsDistances[x+1])5. Save the script.