https://community.esri.com/t5/arcgis-pro-questions/precondition-as-an-either-or/m-p/1097879#M45517 <P><A href="https://pro.arcgis.com/en/pro-app/latest/help/analysis/geoprocessing/modelbuilder/using-preconditions.htm" target="_blank">Preconditions—ArcGIS Pro | Documentation</A>&nbsp; I think, if only one of the preconditions are met (you can have multiple preconditions.&nbsp; You may need to use if-else logic to see if one or the other is met</P> Tue, 14 Sep 2021 02:36:50 GMT DanPatterson 2021-09-14T02:36:50Z https://community.esri.com/t5/arcgis-pro-questions/precondition-as-an-either-or/m-p/1097878#M45516 <P>Anyone have an idea on how to setup an either or type precondition? I have two work flows that lead to the same raster: c_raster, but because of the workflows they end up with two different variable names. In the case of the picture below it's C_raster and C_Raster.&nbsp;&nbsp;</P><P>In the next step the C_raster's physical file path is used in the mosaic tool; however, i need to setup a precondition that make sure the c_raster is created before the mosaic tool runs otherwise i get an incorrect output. Any idea on how to make it so whether the c_Raster precondition or the c_raster's precondition is true that the mosaic will work? If both are added as preconditions the mosaic won't operate because one will inevitable always be false.<span class="lia-inline-image-display-wrapper lia-image-align-center" image-alt="Capture.PNG" style="width: 914px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/22898i980F077B36DDE39C/image-size/large?v=v2&amp;px=999" role="button" title="Capture.PNG" alt="Capture.PNG" /></span></P><P>&nbsp;</P> Tue, 14 Sep 2021 02:26:55 GMT https://community.esri.com/t5/arcgis-pro-questions/precondition-as-an-either-or/m-p/1097878#M45516 AustinGootee 2021-09-14T02:26:55Z https://community.esri.com/t5/arcgis-pro-questions/precondition-as-an-either-or/m-p/1097879#M45517 <P><A href="https://pro.arcgis.com/en/pro-app/latest/help/analysis/geoprocessing/modelbuilder/using-preconditions.htm" target="_blank">Preconditions—ArcGIS Pro | Documentation</A>&nbsp; I think, if only one of the preconditions are met (you can have multiple preconditions.&nbsp; You may need to use if-else logic to see if one or the other is met</P> Tue, 14 Sep 2021 02:36:50 GMT https://community.esri.com/t5/arcgis-pro-questions/precondition-as-an-either-or/m-p/1097879#M45517 DanPatterson 2021-09-14T02:36:50Z