https://community.esri.com/t5/arcgis-pro-questions/using-nested-iterators-to-merge-combinations-of/m-p/1495261#M84783 <P>I have a gdb with different polygons (buffers) in. I want to create all of the different combinations when two of these polygons are merged. I have tried to achieve this with 2 nested iterators, but so far having some issues.</P><P>One issue I have found is only 1 output / combination is created in the gdb, as if the iterator isn't working at all. My latest attempt causes the tool to run infinitely (it seems!!), and I can see there is only one combination of buffers being created / merged in the dialogue pane and in the folders through file explorer.&nbsp;</P><P>Model 1: iterate through feature classes in gdb, merge with different iterated outputs of nested model.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="TaraTwine_0-1718879331810.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/107488i6CCBB69F28EE9610/image-size/medium?v=v2&amp;px=400" role="button" title="TaraTwine_0-1718879331810.png" alt="TaraTwine_0-1718879331810.png" /></span></P><P>v2Buffs1: iterate through feature classes in gdb, outputs to be used in main model merge</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="TaraTwine_1-1718879350317.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/107489i78FBB8DCE5E43251/image-size/medium?v=v2&amp;px=400" role="button" title="TaraTwine_1-1718879350317.png" alt="TaraTwine_1-1718879350317.png" /></span></P><P>Any help much appreciated! Happy to explore options using Python if easier?</P><P>&nbsp;</P> Thu, 20 Jun 2024 10:33:36 GMT ttw_marine 2024-06-20T10:33:36Z https://community.esri.com/t5/arcgis-pro-questions/using-nested-iterators-to-merge-combinations-of/m-p/1495261#M84783 <P>I have a gdb with different polygons (buffers) in. I want to create all of the different combinations when two of these polygons are merged. I have tried to achieve this with 2 nested iterators, but so far having some issues.</P><P>One issue I have found is only 1 output / combination is created in the gdb, as if the iterator isn't working at all. My latest attempt causes the tool to run infinitely (it seems!!), and I can see there is only one combination of buffers being created / merged in the dialogue pane and in the folders through file explorer.&nbsp;</P><P>Model 1: iterate through feature classes in gdb, merge with different iterated outputs of nested model.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="TaraTwine_0-1718879331810.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/107488i6CCBB69F28EE9610/image-size/medium?v=v2&amp;px=400" role="button" title="TaraTwine_0-1718879331810.png" alt="TaraTwine_0-1718879331810.png" /></span></P><P>v2Buffs1: iterate through feature classes in gdb, outputs to be used in main model merge</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="TaraTwine_1-1718879350317.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/107489i78FBB8DCE5E43251/image-size/medium?v=v2&amp;px=400" role="button" title="TaraTwine_1-1718879350317.png" alt="TaraTwine_1-1718879350317.png" /></span></P><P>Any help much appreciated! Happy to explore options using Python if easier?</P><P>&nbsp;</P> Thu, 20 Jun 2024 10:33:36 GMT https://community.esri.com/t5/arcgis-pro-questions/using-nested-iterators-to-merge-combinations-of/m-p/1495261#M84783 ttw_marine 2024-06-20T10:33:36Z https://community.esri.com/t5/arcgis-pro-questions/using-nested-iterators-to-merge-combinations-of/m-p/1495694#M84820 <P>As you likely know, a model can only have one iterator but you can get around this by working with a model within a model as referenced <A href="https://pro.arcgis.com/en/pro-app/latest/help/analysis/geoprocessing/modelbuilder/working-with-model-within-a-model.htm#:~:text=The%20model%20iterates%20over%20a%20few%20feature%20classes%2C,are%20run%20for%20each%20value%20the%20iterator%20returns." target="_self">here</A>.&nbsp; I also worked with a customer that kind of got around the one iterator per model issue by having 3 models that were then accessed via a Python script tool.&nbsp; You can read about it <A href="https://community.esri.com/t5/arcgis-pro-questions/model-builder-help/m-p/1477207" target="_self">here</A>.</P> Thu, 20 Jun 2024 21:43:30 GMT https://community.esri.com/t5/arcgis-pro-questions/using-nested-iterators-to-merge-combinations-of/m-p/1495694#M84820 Robert_LeClair 2024-06-20T21:43:30Z