Fix cudaErrorInvalidPtx: Invalid PTX Code

Overview

cudaErrorInvalidPtx occurs when PTX code fails JIT compilation due to syntax errors or unsupported features.

Error Messages

CUDA error: invalid PTX
cudaErrorInvalidPtx

Common Causes

• •PTX syntax error
• •Unsupported PTX version
• •PTX targets wrong architecture
• •Corrupted PTX file

Solutions

ptxas --gpu-name=sm_86 kernel.ptx

.version 7.5
.target sm_86

Prevention Tips

• ✓Generate PTX from CUDA C++
• ✓Validate with ptxas before deployment

Code Examples

Before (Problematic)

PTX version not supported.

.version 9.0  // Too new for driver

After (Fixed)

Compatible version.

.version 7.5
.target sm_86

Frequently Asked Questions

Related Errors

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