Fix cudaErrorInvalidHandle: Invalid CUDA Handle

Overview

cudaErrorInvalidHandle occurs when using a CUDA handle (stream, event, module) that is invalid or destroyed.

Error Messages

CUDA error: invalid handle
cudaErrorInvalidHandle

Common Causes

• •Using destroyed stream/event
• •Uninitialized handle
• •Handle from different context
• •NULL handle where not allowed

Solutions

cudaStream_t stream;
cudaStreamCreate(&stream);
// ... use stream ...
cudaStreamDestroy(stream);
stream = nullptr;  // Prevent reuse

if (stream != nullptr && stream != cudaStreamDefault) {
    cudaStreamSynchronize(stream);
}

Prevention Tips

• ✓Set handles to nullptr after destroy
• ✓Track handle ownership

Code Examples

Before (Problematic)

Using destroyed handle.

cudaStreamDestroy(stream);
cudaStreamSynchronize(stream);  // Invalid!

After (Fixed)

Clear after destroy.

cudaStreamDestroy(stream);
stream = nullptr;

Frequently Asked Questions

Related Errors

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