Runtime Error Arcgis — Visual Fortran

This write-up applies to ArcGIS Desktop 10.x, ArcView 3.x, and ArcGIS Pro (when using legacy compatibility components). For ArcGIS Pro, consider recompiling any Fortran code with the Intel Fortran Compiler for 64‑bit Windows.

"Severe (38): error during write" or similar output during analysis. The Fix:

Before fixing the error, it helps to understand its origin. visual fortran runtime error arcgis

If the error is numeric (e.g., “floating-point stack overflow”):

: For ArcGIS Pro , ensure the correct version of the Microsoft .NET Desktop Runtime (usually x64) is installed. ArcGIS Pro 3.x specifically requires version 6.0.5 or higher. Common Error Variants This write-up applies to ArcGIS Desktop 10

Ensure that the version of DFORRT.DLL or similar files in your ArcGIS \bin directory matches the requirements of your specific extensions. 4. .NET Runtime Incompatibilities (ArcGIS Pro)

To resolve Visual Fortran runtime errors in ArcGIS, follow these troubleshooting steps: The Fix: Before fixing the error, it helps

ArcGIS 10.3 and later are compiled with /LARGEADDRESSAWARE , allowing up to ~3.2 GB. If you have >4GB RAM, this is good. But some legacy Fortran code misbehaves. To disable:

Alternatively, switch to (free add-on for ArcGIS 10.1–10.8). This runs Fortran code in a separate 64-bit process, bypassing the 3.2 GB limit.