# RIOS pre-processor requirements
**URL:** https://community.naturalcapitalalliance.org/t/rios-pre-processor-requirements/732
**Category:** Software Support
**Tags:** rios
**Created:** [January 8, 2020, 3:34pm UTC](https://community.naturalcapitalalliance.org/t/rios-pre-processor-requirements/732 "2020-01-08T15:34:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@BVIB](https://community.naturalcapitalalliance.org/u/BVIB)
#### Post date: [January 8, 2020, 3:34pm UTC](https://community.naturalcapitalalliance.org/t/rios-pre-processor-requirements/732/1 "2020-01-08T15:34:30Z")
Will the ArcGIS RIOS pre-processor work using only the ArcGIS ‘‘Spatial Analyst’’ extension ?..or does the pre-processor also require other extensions ? (such as: ‘‘Interoperability’’ extension; or the ‘‘3D Analyst’’ extension; etc)
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### Author:  [@swolny](https://community.naturalcapitalalliance.org/u/swolny)
#### Post date: [January 8, 2020, 4:02pm UTC](https://community.naturalcapitalalliance.org/t/rios-pre-processor-requirements/732/2 "2020-01-08T16:02:24Z")
Hi @BVIB -
The RIOS pre-processor that we provide requires the Spatial Analyst extension only, no others.
Apologies, I see that you asked that in a previous post and I didn’t respond. Sorry that the Viridian version didn’t work for you. In case you’d rather try it manually, [here are the step-by-step instructions](https://www.dropbox.com/s/mqn3eu9mob1in1g/RIOS_preproc_step_by_step.docx?dl=0) that are implemented in the pre-processor. They’re described by ArcGIS functions (many of which still involve Spatial Analyst), but if you know QGIS, you might be able to do the same thing manually there without buying an Arc extension.
~ Stacie
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### Author:  [@BVIB](https://community.naturalcapitalalliance.org/u/BVIB)
#### Post date: [January 8, 2020, 5:11pm UTC](https://community.naturalcapitalalliance.org/t/rios-pre-processor-requirements/732/3 "2020-01-08T17:11:41Z")
Thanks ! Appreciate the info.