topic Re: ArcGIS Pro CoreHost standalone Program Issue in ArcGIS Pro SDK Questions

ArcGIS Pro CoreHost standalone Program Issue

gaofangwan — Mon, 07 Jul 2025 05:51:29 GMT

Hi Everyone,

I installed ArcGIS Pro 3.5 and then created a program with "ArcGIS Pro CoreHost application" template in Visual Studio 2022, and added little number line of code to open a FileGDB after Host.Initialize().

When Debuging it, it throw exception: "Unhandled exception: System.DllNotFoundException: Unable to load DLL 'CoreInterop.dll' or one of its dependencies: The specified procedure could not be found. (0x8007007F)"

And I have check that "C:\Program Files\ArcGIS\Pro\bin" have been added to the PATH System Environment Variable as here suggested.

If anyone know why? Please tell me how to solve it , thanks.

Re: ArcGIS Pro CoreHost standalone Program Issue

Aashis — Mon, 07 Jul 2025 14:49:50 GMT

Are ArcGIS.Core.dll & ArcGIS.CoreHost.dll set to `Copy Local: Yes`?

If this doesn't work, please zip your project and post it in the thread so that we can download it for further investigation.

Re: ArcGIS Pro CoreHost standalone Program Issue

Wolf — Wed, 30 Jul 2025 19:03:52 GMT

@Aashis is correct, but if you want to use the assemblies in your ArcGIS Pro / bin folder you can model your code using this sample: arcgis-pro-sdk-community-samples/CoreHost/CoreHostResolveAssembly at master · Esri/arcgis-pro-sdk-community-samples

The sample is using this code snippet to resolve the assembly path when the assembly is being loaded:

// Resolve ArcGIS Pro assemblies. AppDomain currentDomain = AppDomain.CurrentDomain; currentDomain.AssemblyResolve += new ResolveEventHandler(ResolveProAssemblyPath); // Perform all your CoreHost tasks (API calls) in a method // instead of in the Main method (you can't use the PRO API from within Main): try { PerformCoreHostTask(args); }

Re: ArcGIS Pro CoreHost standalone Program Issue

gaofangwan — Thu, 31 Jul 2025 09:00:44 GMT

Hi @Wolf and @Aashis , I have solved the issue by re-installing Windows operation system and ArcGIS Pro.

Re: ArcGIS Pro CoreHost standalone Program Issue

seenohearnospeaknoevil — Wed, 29 Apr 2026 19:22:17 GMT

You can always try kicking the box if that doesn't work. For me, Wolf's suggestion offers a more cost effective, not to mention logical, solution.