It's a system variable in Windows. I believe you can substitute "AGSDESKTOPJAVA" for "ARCGISHOME" since AGSDESKTOPJAVA is installed with ArcGIS 10. I just changed the variable and it worked. Old line: tbx_home = os.environ['ARCGISHOME'].replace("\\","/") + \ "ArcToolbox/Toolboxes/" New line: tbx_home = os.environ['AGSDESKTOPJAVA'].replace("\\","/") + \ "ArcToolbox/Toolboxes/"
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