- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello,
I'm trying to implement the Mnist example on NCS with a custom model.
I was able to generate the .xml .bin files sucessfully but when I run the files I get this error:
error: (-215:Assertion failed) Failed to initialize Inference Engine backend: [VPU] Internal error: Output in max_pooling2d_5/MaxPool has incorrect width dimension. Expected: 6 or 6 Actual: 5 in function 'initPlugin'
I did the math and the result of output layer is 5.5 (input = 11 / kernel = 2 / stride = 2). The model approached to 5 but VPU needs 6.
How can I resolve this?
Link Copied
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dear antonio - how are you accomplishing inferencing ? Do you have your own program ?
It's difficult to diagnose the issue just based on what you've said.
So seems like IR rounded 5.5 to 5 but Inference Engine is expecting 6. Can you try manually editing(changing) the 5 to a 6 in your generated XML (for the output layer) and see if it works ? First try that experiment and see if it works. Please post your results here.
Thanks,
Shubha
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
I trained with Keras the follow NN: Conv1-MaxPool1-Conv2-MaxPool2-Conv3-MaxPool3 and all MaxPool have kernel=2,2 and stride=2,2. I saved the model as .pb file and converted to IR through "mo.py" file.
The files .xml and .bin were generated without problems and for inference I used the Python/OpenCv code from the first example of the Raspbian.
I changed manually the output from 5 to 6 and as expected I have an error in next layer because output of maxpool is input for next layer. So, I changed manually all following layers but now I have an error in weights size.
The solution that I found was to retrain NN with kernel=3,3 on second and third maxpool layers in order to get an even number on output.
Before:
2 maxpool layer: input=11 kernel=2 stride=2 output:11-2/2 +1=5.5
3 maxpool layer: input=3 kernel=2 stride=2 output:3-2/2 +1=1.5
After:
2 maxpool layer: input=11 kernel=3 stride=2 output:11-3/2 +1=5
3 maxpool layer: input=3 kernel=3 stride=2 output:3-3/2 +1=1
My question was whether there is any way to solve this in the conversion to IR through a flag or so, because it is not very practical to do the calculations.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dear antonio,
You've asked a great question. Please give me some time to investigate this !
I will post my answer here.
Thanks for using OpenVino !
Shubha
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Antonio, I have sent you a PM to enable sending me your original model as a zip file so that I can reproduce your error.
Thanks,
Shubha
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Also Antonio, you may want to retry your original code on the latest release of OpenVino 2019 R1, which was released just yesterday.
Thanks,
Shubha
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Shubha, I have the same issue with tiny yolo model.
Loading[ ERROR ] [VPU] Internal error: Output in detector/yolo-v3-tiny/pool2_5/MaxPool@tile=1/4 has incorrect width dimension. Expected: 25 or 25 Actual: 26
I am using latest OpenVINO release and tiny yolo model trained by myself and converted to tensorflow by mystic123 scripts. Have you investigated the way to resolve such issues?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello, Shubha!
I have a very similar issue. I am trying to run tiny yolo v3 inference on the modified object_detection_demo_yolov3_async.
We have the yolov3 tiny model trained on our dataset. Its input shape is 1,832,832,3 and it causes the following error:
[ INFO ] Loading model to the plugin
[ INFO ] +0.0011 Loading[ ERROR ] [VPU] Internal error: Output in detector/yolo-v3-tiny/pool2_5/MaxPool@tile=1/4 has incorrect width dimension. Expected: 25 or 25 Actual: 26
Loaded 0 networks
When I try yolo3 tiny model by Hyodo Katsuya (which input is 416x416) everything goes good (except that it is trained on the very different dataset) - Myriad plugin loads it, then inference goes fine and a network even finds something.
The only difference between two networks is a dimension of every input and output shape, our dimensions are twice of Hyodo's.
Can you assist me in this issue, please? Thank you.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
To the moderator: I'm sorry for possible duplication of messages = )
Finally, it looks like a bug!
I am adding my layer definition from the xml file of the model at the end of this message.
As I understand this IR Notation Reference
auto_pad means that needed padding will be added to the input in order to match the output size after pooling
pads_end="1,1" means that additional zero-value pixel will be added to the right and bottom side of the frame, which leads to the matching, mentioned before (26 pixels scanned by kernel 2 with stride 1 produces 25 pixels, but additional padding pixel compensates this inequality).
However, I still have such error message from both R5 2018 and R1 2019 OpenVINO releases:
[ ERROR ] [VPU] Internal error: Output in detector/yolo-v3-tiny/pool2_5/MaxPool@tile=1/4 has incorrect width dimension. Expected: 25 or 25 Actual: 26
Layer definition:
<layer id="18" name="detector/yolo-v3-tiny/pool2_5/MaxPool" precision="FP16" type="Pooling">
<data auto_pad="same_upper" exclude-pad="true" kernel="2,2" pads_begin="0,0" pads_end="1,1" pool-method="max" strides="1,1"/>
<input>
<port id="0">
<dim>1</dim>
<dim>512</dim>
<dim>26</dim>
<dim>26</dim>
</port>
</input>
<output>
<port id="1">
<dim>1</dim>
<dim>512</dim>
<dim>26</dim>
<dim>26</dim>
</port>
</output>
</layer>
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dear Belykh, Aleksandr,
I fully believe that this is a bug in the Myriad Plugin. I have filed it on your behalf.
Thanks for your cooperation.
Shubha
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dear Shubha.
Good news is that I have found a workaround for the issue.
I have removed auto_pad="same_upper" and swapped padding "1,1"/"0,0" between pads_begin and pads_end.
The network works fine with pads_begin="1,1" at the moment.
Here is the full picture of the layer description:
<layer id="18" name="detector/yolo-v3-tiny/pool2_5/MaxPool" precision="FP16" type="Pooling">
<data exclude-pad="true" kernel="2,2" pads_begin="1,1" pads_end="0,0" pool-method="max" strides="1,1"/>
<input>
<port id="0">
<dim>1</dim>
<dim>512</dim>
<dim>26</dim>
<dim>26</dim>
</port>
</input>
<output>
<port id="1">
<dim>1</dim>
<dim>512</dim>
<dim>26</dim>
<dim>26</dim>
</port>
</output>
</layer>
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dearest Belykh, Aleksandr,
Thank you kindly for sharing your findings with the OpenVino community ! This is really appreciated. I have filed a bug on this issue though, and hopefully it should be fixed in the next release.
Thanks for using OpenVino !
Shubha

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page