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Hi, I used Simapro and Openlca software with  ecoinvent database with the same versions and from the impact2002+ method, version 2.15 for Simapro and version 2.14 for openlca, the results of all impact categories are almost the same, except for land use. anyone can guide me and tell me the reason?

in openLCA by (190 points)

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This is a somewhat older method, from memory, SimaPro assigns some land use flows differently (ecoinvent processes have different categories in SimaPro then in ecoinvent), and some factors are also we think incorrect in SimaPro, so this deviation is on purpose. You can easily check the contribution in openLCA and to some extent this is also visible in SimaPro so that you can have a look?