# Error in TensorRT ssd sample inference

**URL:** <https://forums.developer.nvidia.com/t/error-in-tensorrt-ssd-sample-inference/78599>\
**Category:** TensorRT\
**Created:** [July 24, 2019, 7:22am UTC](https://forums.developer.nvidia.com/t/error-in-tensorrt-ssd-sample-inference/78599 "2019-07-24T07:22:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![k.sambasivarao13](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@k.sambasivarao13](https://forums.developer.nvidia.com/u/k.sambasivarao13)\
**Post date:** [July 24, 2019, 7:22am UTC](https://forums.developer.nvidia.com/t/error-in-tensorrt-ssd-sample-inference/78599/1 "2019-07-24T07:22:19Z")

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Hi, I am testing the ssd sample provided in TensorRT, I changed the deploy.prototxt as mentioned in the README.md, but i am getting error in parsing the model file.

[E] [TRT] mbox\_loc: all concat input tensors must have the same dimensions except on the concatenation axis  
[E] [TRT] mbox\_conf: all concat input tensors must have the same dimensions except on the concatenation axis[/b]  
Caffe Parser: Invalid axis in softmax layer - Cannot perform softmax along batch size dimension and expects NCHW input. Negative axis is not supported in TensorRT, please use positive axis indexing  
error parsing layer type Softmax index 98  
[I] End parsing model…  
Segmentation fault (core dumped)

Kindly help me with this.

Regards  
K Sambasivarao

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<div class="post-metadata">

**Author:** ![k.sambasivarao13](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@k.sambasivarao13](https://forums.developer.nvidia.com/u/k.sambasivarao13)\
**Post date:** [July 24, 2019, 10:21am UTC](https://forums.developer.nvidia.com/t/error-in-tensorrt-ssd-sample-inference/78599/2 "2019-07-24T10:21:52Z")

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Hi,

Sry the modifications in prototxt are wrong. Now it is working fine.

Thanks

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**Author:** ![sathiez](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sathiez](https://forums.developer.nvidia.com/u/sathiez)\
**Post date:** [August 8, 2019, 1:11pm UTC](https://forums.developer.nvidia.com/t/error-in-tensorrt-ssd-sample-inference/78599/3 "2019-08-08T13:11:29Z")

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Hi,  
I get same error, How you solved it? can you share prototxt?

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**Author:** ![TomNVIDIA](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/tomnvidia/32/14181_2.png) [@TomNVIDIA](https://forums.developer.nvidia.com/u/TomNVIDIA)\
**Post date:** [October 12, 2021, 7:48pm UTC](https://forums.developer.nvidia.com/t/error-in-tensorrt-ssd-sample-inference/78599/4 "2021-10-12T19:48:01Z")

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