# Overlay loading error

**URL:** <https://discuss.pynq.io/t/overlay-loading-error/7210>\
**Category:** Support\
**Created:** [June 27, 2024, 10:01am UTC](https://discuss.pynq.io/t/overlay-loading-error/7210 "2024-06-27T10:01:20Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Harshith\_N](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/harshith_n/32/6017_2.png) [@Harshith\_N](https://discuss.pynq.io/u/Harshith_N)\
**Post date:** [June 27, 2024, 10:01am UTC](https://discuss.pynq.io/t/overlay-loading-error/7210/1 "2024-06-27T10:01:20Z")

</div>

PYNQ version : v3.0.1  
Board name : PYNQ-Z1  
Tool Version : 2022.2

ERROR Faced:

```python
TimeoutError Traceback (most recent call last)
TimeoutError: [Errno 110] Connection timed out

During handling of the above exception, another exception occurred:

TimeoutError Traceback (most recent call last)
Input In [3], in <cell line: 1>()
----> 1 overlay = Overlay('/home/xilinx/jupyter_notebooks/Atomic_Ops/atomic_ops_1.bit')

File /usr/local/share/pynq-venv/lib/python3.10/site-packages/pynq/overlay.py:348, in Overlay. __init__ (self, bitfile_name, dtbo, download, ignore_version, device, gen_cache)
    345 self.systemgraph = None
    347 if download:
--> 348 self.download()
    349 else:
    350 if gen_cache:

File /usr/local/share/pynq-venv/lib/python3.10/site-packages/pynq/overlay.py:428, in Overlay.download(self, dtbo)
    425 else:
    426 Clocks.set_pl_clk(i)
--> 428 super().download(self.parser)
    429 if dtbo:
    430 super().insert_dtbo(dtbo)

File /usr/local/share/pynq-venv/lib/python3.10/site-packages/pynq/bitstream.py:168, in Bitstream.download(self, parser)
    151 def download(self, parser=None):
    152 """Download the bitstream onto PL and update PL information.
    153 
    154 If device tree blob has been specified during initialization, this
   (...)
    166 
    167 """
--> 168 self.device.download(self, parser)

File /usr/local/share/pynq-venv/lib/python3.10/site-packages/pynq/pl_server/embedded_device.py:681, in EmbeddedDevice.download(self, bitstream, parser)
    679 with open(self.BS_FPGA_MAN_FLAGS, "w") as fd:
    680 fd.write(str(flag))
--> 681 with open(self.BS_FPGA_MAN, "w") as fd:
    682 fd.write(bitstream.binfile_name)
    684 self.set_axi_port_width(parser)

TimeoutError: [Errno 110] Connection timed out

```

Block Diagram:

 ![image](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/e/ef447f6d0e544da8db1714b1305c0339fd383d29.png)

Files addes to Jupyter Directory: .bit, .tcl, .hwh

 ![image](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/b/b345893550719cada65e62c07bb569e62a728ae2.png)

---

<div class="post-metadata">

**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\
**Post date:** [June 27, 2024, 12:35pm UTC](https://discuss.pynq.io/t/overlay-loading-error/7210/2 "2024-06-27T12:35:06Z")

</div>

Hi @Harshith_N,

I noticed that the aresetn signal of the AXI Smart Connect is not connected. Also. make sure you’re using the right device in Vivado.

Mario

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<div class="post-metadata">

**Author:** ![matthew](https://avatars.discourse-cdn.com/v4/letter/m/ed655f/32.png) [@matthew](https://discuss.pynq.io/u/matthew)\
**Post date:** [June 27, 2024, 3:41pm UTC](https://discuss.pynq.io/t/overlay-loading-error/7210/3 "2024-06-27T15:41:32Z")

</div>

There could be useful information about where to put the files in that older request:

# [Server Connection Error - File Save Error design.ipynb](https://discuss.pynq.io/t/server-connection-error-file-save-error-design-ipynb/7004)