Fix cudaErrorNotMapped: Resource Not Mapped

Overview

cudaErrorNotMapped occurs when accessing a resource that hasn't been mapped yet.

Error Messages

CUDA error: not mapped
cudaErrorNotMapped

Common Causes

• •Forgot to call map
• •Accessed after unmap
• •Wrong resource handle

Solutions

cudaGraphicsMapResources(1, &res, stream);
void* ptr;
cudaGraphicsResourceGetMappedPointer(&ptr, &size, res);

Prevention Tips

• ✓Map before accessing
• ✓Check return values

Code Examples

Before (Problematic)

Resource not mapped.

cudaGraphicsResourceGetMappedPointer(&ptr, &size, res);  // Not mapped!

After (Fixed)

Mapped first.

cudaGraphicsMapResources(1, &res, 0);
cudaGraphicsResourceGetMappedPointer(&ptr, &size, res);

Frequently Asked Questions

Related Errors

Need help debugging CUDA errors? Download RightNow AI for intelligent error analysis and optimization suggestions.