# DOCA DPA Error CQE

**URL:** <https://forums.developer.nvidia.com/t/doca-dpa-error-cqe/267889>\
**Category:** Enterprise Networking\
**Tags:** bluefield-smartnic\
**Created:** [September 28, 2023, 11:51am UTC](https://forums.developer.nvidia.com/t/doca-dpa-error-cqe/267889 "2023-09-28T11:51:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![RongxinCheng](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@RongxinCheng](https://forums.developer.nvidia.com/u/RongxinCheng)\
**Post date:** [September 28, 2023, 11:51am UTC](https://forums.developer.nvidia.com/t/doca-dpa-error-cqe/267889/1 "2023-09-28T11:51:45Z")

</div>

I encounter an error CQE when launch a put\_singal kernel with `doca_dpa_kernel_launch_update_set`. All my codes run in a single thread.

The error message I receive is:

```bash
/ 6/Received CQE of type ERR_CQE with the following attributes: srqn_or_user_index 0x0, vendor_err_synd 0x88, syndrome 0x13, s_wqe_opcode_qpn 0xa56b0008, wqe_counter 0x200, signature 0x72, op_own 0xd2

```

The kernel logic is as follows:

```c
__dpa_global__ void put_signal(doca_dpa_dev_ep_t ep,
                               doca_dpa_dev_mem_t src_mem,
                               uint64_t src_addr,
                               uint32_t src_rkey,
                               uint64_t dst_addr,
                               uint32_t dst_rkey,
                               doca_dpa_dev_sync_event_remote_t event)
{
    int rank = doca_dpa_dev_thread_rank();
    doca_dpa_dev_printf("Thread %d starts!\n", rank);
    int length = 64;
    doca_dpa_dev_put_signal_set_nb(
        ep, src_addr + rank * length, src_mem, length,
        dst_addr + rank * length, dst_rkey,
        event, 1);
    doca_dpa_dev_printf("Thread %d posts a request!\n", rank);
    doca_dpa_dev_ep_synchronize(ep);
    doca_dpa_dev_printf("Thread %d finishes sending data!\n", rank);
}

```

My bug is ok when I run `doca_dpa_dev_put_nb` in kernel, but is buggy in the above case. I wonder what vendor\_err\_synd 0x88 means and what should I do to fix it, thanks.

---

<div class="post-metadata">

**Author:** ![RongxinCheng](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@RongxinCheng](https://forums.developer.nvidia.com/u/RongxinCheng)\
**Post date:** [September 29, 2023, 7:30am UTC](https://forums.developer.nvidia.com/t/doca-dpa-error-cqe/267889/2 "2023-09-29T07:30:17Z")

</div>

I suspect that DOCA just does not allow a thread to send a signal through DPA to itself.