Strange error: Uncaught (in promise) TypeError: Cannot read property '0' of null

[Emmanuel Goldstein]

Hi,
I'm trying to run a FrozenModel on tfjs.
At first there's something wrong with input dimension. In fact, when I first created the model in python, I wrote:

self.scalarInput =  tf.placeholder(shape=[None,21168],dtype=tf.float32, name=myScope+"_scalarinput")

When I run the model on tfjs I get:

Error: The shape of dict['main_scalarinput'] provided in model.execute(dict) must be [], but was [21168]

Why does it require a scalar?

However, I tried to feed in a dummy scalar, and I got (in firefox):

TypeError: r is null tf-core.esm.js:17:200981

More details:

Promise { "rejected" }

<state>: "rejected"

<reason>: TypeError: r is null Stack trace: parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</MathBackendWebGL</e.prototype.getValuesFromTexture@http://localhost:1234/ml4.29d6f37a.js:27227:50 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</MathBackendWebGL</e.prototype.readSync@http://localhost:1234/ml4.29d6f37a.js:27213:76 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.readSync@http://localhost:1234/ml4.29d6f37a.js:25077:12 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Tensor</e.prototype.dataSync@http://localhost:1234/ml4.29d6f37a.js:24679:36 runProgram/<@http://localhost:1234/ml4.29d6f37a.js:26388:52 runProgram@http://localhost:1234/ml4.29d6f37a.js:26384:90 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</MathBackendWebGL</e.prototype.compileAndRun@http://localhost:1234/ml4.29d6f37a.js:27593:73 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</MathBackendWebGL</e.prototype.concat@http://localhost:1234/ml4.29d6f37a.js:27283:56 concat2Tensors/<@http://localhost:1234/ml4.29d6f37a.js:32996:12 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.runKernel/<@http://localhost:1234/ml4.29d6f37a.js:25000:12 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.scopedRun@http://localhost:1234/ml4.29d6f37a.js:24982:15 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.runKernel@http://localhost:1234/ml4.29d6f37a.js:24993:39 concat2Tensors@http://localhost:1234/ml4.29d6f37a.js:32995:26 concat_@http://localhost:1234/ml4.29d6f37a.js:32986:110 o@http://localhost:1234/ml4.29d6f37a.js:31630:15 stack_@http://localhost:1234/ml4.29d6f37a.js:33371:13 o@http://localhost:1234/ml4.29d6f37a.js:31630:15 executeOp$13/<@http://localhost:1234/ml4.29d6f37a.js:41764:21 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.tidy/<@http://localhost:1234/ml4.29d6f37a.js:24978:19 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.scopedRun@http://localhost:1234/ml4.29d6f37a.js:24982:15 parcelRequire<["node_modules/@tensorflow/tfjs/node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Engine</e.prototype.tidy@http://localhost:1234/ml4.29d6f37a.js:24973:13 parcelRequire<["node_modules/@tensorflow/tfjs-core/dist/tf-core.esm.js"]</Environment</e.tidy@http://localhost:1234/ml4.29d6f37a.js:31422:38 executeOp$13@http://localhost:1234/ml4.29d6f37a.js:41757:15 executeOp$15@http://localhost:1234/ml4.29d6f37a.js:41800:14 parcelRequire<["node_modules/@tensorflow/tfjs-converter/dist/tf-converter.esm.js"]</GraphExecutor</e.prototype.executeWithControlFlow/</<@http://localhost:1234/ml4.29d6f37a.js:41916:208 i/</<@http://localhost:1234/ml4.29d6f37a.js:40499:64 i/<@http://localhost:1234/ml4.29d6f37a.js:40484:14 s@http://localhost:1234/ml4.29d6f37a.js:40457:11

 
When using Chrome, I get:

Uncaught (in promise) TypeError: Cannot read property '0' of null
    at e.getValuesFromTexture (tf-core.esm.js:17)
    at e.readSync (tf-core.esm.js:17)
    at e.readSync (tf-core.esm.js:17)
    at e.dataSync (tf-core.esm.js:17)
    at tf-core.esm.js:17
    at Array.forEach (<anonymous>)
    at runProgram (tf-core.esm.js:17)
    at e.compileAndRun (tf-core.esm.js:17)
    at e.concat (tf-core.esm.js:17)
    at ENV.engine.runKernel.a (tf-core.esm.js:17)

I believe that the two problems are related.. So what could I do?
Thanks a lot for your help

[Daniel Smilkov]

+Ping Yu Any ideas what might be happening? Thank you!

Daniel

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[Ping Yu]

Thank you Daniel, I have been working on this issue in https://github.com/tensorflow/tfjs/issues/615.

I have identified the causes and submitted a fix PR with the converter, will  push out a new release soon.

Ping