# HIP Bugs 

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- [Errors related to undefined reference to `__hcLaunchKernel__***__grid_launch_parm**](#error-undefined-reference)

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### Errors related to undefined reference to `__hcLaunchKernel__***__grid_launch_parm**

Some common code practices may lead to hipcc generating a error with the form :
undefined reference to `__hcLaunchKernel__ZN15vecAddNamespace6vecAddIidEEv16grid_launch_parmPT0_S3_S3_T_

To workaround, try:
- Avoid calling hcLaunchKernel from a function with the __host__ attribute
__host__ MyFunc(…) {
hipLaunchKernel(myKernel, …)
- Avoid use of static with kernel definition:
static __global__ MyKernel 
- Avoid defining kernels in anonymous namespace
namespace {
__global__ MyKernel …
- Avoid calling member functions