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When adding a Geography Markup Language (GML) file to ArcMap, the following error message occurs:
“Unable to read GML file”
The ArcGIS OGC Interoperability Add-on supports the ESRI GML profile, and is a subset of the GML 2.1.2 specification. The file being loaded includes elements unsupported by the ESRI GML profile.
Load only GML files that support the ESRI GML profile.