Alex « Alex Sleat

TensorFlow / Keras Model Predict Error

Unexpected error: Tensor Tensor(“dense_1/BiasAdd:0”, shape=(?, 3), dtype=float32) is not an element of this graph.

To Fix:

Make sure to include the following global:

import tensorflow as tf global graph,model graph = tf.get_default_graph()

And surround the prediction as such:

with graph.as_default(): segment = self.model.predict(features)

ERROR: Failed to build gem native extension.

While attempting to install a package from gem, I encountered this issue:

sudo gem install dashing Building native extensions. This could take a while… ERROR: Error installing dashing: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require’: cannot load such file — mkmf (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require’ from extconf.rb:2:in `’ Gem files […]

apt-get error “E: Unable to correct problems, you have held broken packages.”

The problem you have encountered is basically the package, or dependencies that are conflicting or broken and are therefore “held”.

You can check what (if any) packages are held using the following command:

dpkg –get-selections | grep hold

apt-mark showhold

If there’s no packages, or no output. That means it’s probably a dependency […]

Node-red throw err

Error:

When trying to run Node-RED I encountered the following error: Essentially it’s missing the module “express”, as can be seen by the 5 line.

module.js:340 throw err; ^ Error: Cannot find module ‘express’ at Function.Module._resolveFilename (module.js:338:15) at Function.Module._load (module.js:280:25) at Module.require (module.js:364:17) at require (module.js:380:17) at Object. (/home/alex/Apps/node-red/node-red-0.9.1/red.js:19:15) at Module._compile (module.js:456:26) at Object.Module._extensions..js […]

Testing Failed: “Failed: error: SBT did not send a reply to our request, perhaps it was killed or failed to start”

Activator error “Failed: error: SBT did not send a reply to our request, perhaps it was killed or failed to start”.

This may be because SBT isn’t installed, SBT is a “simple build tool” for scala which isn’t packaged with the main binaries. You can download and install the latest SBT from the official […]

Linux Mint: “Could not download all repository indexes”

When running

sudo apt-get update

or attempting to update via the Update Manager in Linux Mint (13), I was fronted with the following error:

Failed to fetch http://packages.linuxmint.com/dists/deb … tion-en_US Unable to connect to packages.linuxmint.com:http: Failed to fetch http://packages.linuxmint.com/dists/deb … slation-en Unable to connect to packages.linuxmint.com:http: Failed to fetch http://packages.linuxmint.com/dists/deb … tion-en_US […]

Microchip MPLAB X – Link Error: region is full / section overlaps section

While trying to compile some code on MPLAB X I came across this link error, stating that my #pragma config bits were full or sections of them were overlapping other sections.

/Applications/microchip/xc16/v1.11/bin/bin/../bin/elf-ld: Link Error: region FOSC is full (dist/default/production/can_to_serial.production.elf section __FOSC) /Applications/microchip/xc16/v1.11/bin/bin/../bin/elf-ld: Link Error: region FWDT is full (dist/default/production/can_to_serial.production.elf section __FWDT) /Applications/microchip/xc16/v1.11/bin/bin/../bin/elf-ld: Link Error: […]

Unknown encoder ‘libx264’

If you encounter a problem similar to the following, where you’re missing the libx264 codec try this solution.

avconv -r 10 -i image%06d.jpg -r 10 -vcodec libx264 -crf 20 -g 15 timelapse1.mp4 avconv version 0.8.6-6:0.8.6-0ubuntu0.12.10.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:02:16 with gcc 4.7.2 Input #0, image2, from […]

VirtualBox (4.26) USB Issue: “unable to enumerate USB device on port n”

After a couple of hours trying to get a USB device (USB-to-Serial FTDI) working in VirtualBox with OSX host and Ubuntu 12.10 guest and receiving an error message similar to the follow:

usb 6-3: new full speed USB device number 24 using ohci_hcd usb 6-3: device not accepting address 24, error -110 hub 6-0:1.0: […]

Raspberry Pi – Web Server (lighttpd)

Over the weekend I’ve been playing around with the Raspberry Pi and lighttpd in order to get a little webserver running. lighttpd seemed to be a common choice, thanks to it’s simplicity and lightweightness (*possibly not a real word). There’s a plethora of examples of getting it up and […]

Alex Sleat