Question 1

What are IGES/IGS files?

Accepted Answer

IGES (.igs/.iges) is a CAD interchange format used to exchange geometry between CAD systems (curves, surfaces, trimmed faces).

Question 2

Are files uploaded to manuals.plus?

Accepted Answer

Drag & drop and Browse loads are processed in your browser. If you load from a URL, your browser fetches that URL directly (subject to CORS).

Question 3

Why does URL loading fail sometimes?

Accepted Answer

Browsers enforce CORS. The host serving the .igs/.iges must allow cross-origin requests (Access-Control-Allow-Origin).