Neural net example not working

Question

Bug introduced in 11.0.0 and fixed via paclet update

The Wolfram Mathematica site provides this example.

I have copied and pasted into a notebook. The resource is reached and correctly sampled.

However, the following does not run.

convnet = 
 NetChain[{ConvolutionLayer[20, {5, 5}], ElementwiseLayer[Ramp], 
   PoolingLayer[{2, 2}, {2, 2}], ConvolutionLayer[50, {5, 5}], 
   ElementwiseLayer[Ramp], PoolingLayer[{2, 2}, {2, 2}], 
   FlattenLayer[], DotPlusLayer[500], ElementwiseLayer[Ramp]}, 
  "Input" -> NetEncoder[{"Image", {32, 32}}]]

The following error is produced:

Apologies for the size.

Have other users experience the same error?

(I am on Windows 10).

I have contacted Technical Support. Will update if and when a reply. — ubpdqn, Aug 19 '16 at 00:36
Same problem with this example. I have not tried other ones. — andre314, Aug 19 '16 at 01:01
Thank you everyone. Will update with any information from Wolfram TS. Appreciate any other advice. :) — ubpdqn, Aug 19 '16 at 01:24

score 11 · Accepted Answer · answered Aug 24 '16 at 16:33

11

This is actually a bug in a separate paclet that corrupts kernel state. It happens to show up here in neural networks. It has been fixed and a patch issued, your local install should acquire the update in time, but you should be able to force an update by running PacletUpdate["Streaming"].

In the meantime (or if that doesn't work for you), you can avoid this issue by running NetChain; on a fresh kernel (i.e. Quit) before running the example code.

answered Aug 24 '16 at 16:33

Taliesin Beynon

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thank you very much for answer. – ubpdqn Aug 24 '16 at 20:39
Did this issue first appear in 11.0.0? I wish to add an appropriate bugs header, per site convention. – Mr.Wizard Aug 31 '16 at 07:30

Neural net example not working

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