Render error during GPU-accelerated export when auto-save writes backup
Context Premiere Pro's auto-save runs on the main thread at a configurable interval (default 15 minutes) and writes .prproj.backup files to the Auto-Save folder. During GPU-accelerated H.264/HEVC hardware encodes, this write operation can interrupt the render pipeline, producing a generic "Render error" or "Export failed" message with no specific error code.
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