Fix cudaErrorArrayIsMapped: Array Still Mapped

Overview

cudaErrorArrayIsMapped occurs when attempting to free or modify an array that is currently mapped for graphics interop.

Error Messages

CUDA error: array is mapped
cudaErrorArrayIsMapped

Common Causes

• •Freeing array while still mapped
• •Nested mapping calls
• •Forgetting to unmap after use

Solutions

cudaGraphicsUnmapResources(1, &resource, stream);
cudaGraphicsUnregisterResource(resource);

Prevention Tips

• ✓Use RAII for map/unmap
• ✓Track mapping state

Code Examples

Before (Problematic)

Array still mapped.

cudaGraphicsMapResources(1, &res, 0);
cudaFreeArray(array);  // Error!

After (Fixed)

Properly unmapped.

cudaGraphicsMapResources(1, &res, 0);
// use array
cudaGraphicsUnmapResources(1, &res, 0);

Frequently Asked Questions

Related Errors

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