Category Archives: Errors

VirtualDog Tutorial PluralSight

Hey everyone,

Just taking a quick look at Jasmine with Typescript and found a decent looking tutorial on PluralSight with a sample app called VirtualDog. Attempting to run the following command resulted in an error on Windows 10:

npm run bower-typings

> concurrently “bower install” “typings install”

[0] ‘bower’ is not recognized as an internal or external command,
[0] operable program or batch file.
[1] ‘typings’ is not recognized as an internal or external command,
[1] operable program or batch file.
[1] typings install exited with code 1
[0] bower install exited with code 1

npm ERR! Windows_NT 10.0.15063
npm ERR! argv “C:\\Program Files\\nodejs\\node.exe” “C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js” “run” “bower-typings”
npm ERR! node v6.11.3
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! VitrualDog@0.0.1 bower-typings: `concurrently “bower install” “typings install” `
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the VitrualDog@0.0.1 bower-typings script ‘concurrently “bower install” “typings install” ‘.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the VitrualDog package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! concurrently “bower install” “typings install”
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs VitrualDog
npm ERR! Or if that isn’t available, you can get their info via:
npm ERR! npm owner ls VitrualDog
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\Chris-PC\Desktop\Testing Javascript with Jasmine and Typescript\virtualdog-begin\npm-debug.log

In order to fix it, just run the following command:
npm install -g bower

Thanks to the following link: https://stackoverflow.com/a/37669968/522859

Compass Only Works on Pins 10 and 11 – Arduino/Software Serial

Hey everyone,

A bit of a confusing issue I ran into today. I couldn’t get my compass to work on any pins other than 10 or 11. Thankfully, there’s a fairly logical explanation:

Not all pins on the Mega and Mega 2560 support change interrupts, so only the following can be used for RX: 10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62), A9 (63), A10 (64), A11 (65), A12 (66), A13 (67), A14 (68), A15 (69).

I ended up using pins 50 and 51 and it all worked fine. See the following links for more info:
https://www.arduino.cc/en/Reference/softwareSerial
https://arduino.stackexchange.com/a/35719/37451

UnicodeDecodeError on RaspberryPi – Python

Hey everyone,

I ran into the following error while trying to read serial input on a Raspberry Pi hooked up to an Arduino via USB:

UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0za8 in position 0: invalid start byte

The solution was as follows:

#buffer_string = ser.read().decode('utf-8')
buffer_string = ser.read().decode('utf-8', errors='replace')

Thanks to the following link: https://github.com/OpenBCI/OpenBCI_Python/issues/24

Exited with code 9009 – Visual Studio Build

Hey everyone,

I ran into the following error today while attempting to build a solution:

combiner exited with code 9009

It apparently means that a file couldn’t be found. The solution was to simply restart visual studio.

I’d been manually adding them to the directory and this is apparently a common cause. See the following Stackoverflow post for more info: https://stackoverflow.com/a/28198020/522859

TensorFlow – KeyError: “The name ‘import/input’ refers to an Operation not in the graph.

Hey everyone,

Just another small error I’ve run into while testing out Tensorflow’s label image example (Tensorflow/tensorflow/examples/image_retraining/label_image.py):

KeyError: "The name 'import/input' refers to an Operation not in the graph.

This one thankfully doesn’t seem to be my fault. In label_image.py change the following lines:

# Line 78-79
input_layer = "input"
output_layer = "InceptionV3/Predictions/Reshape_1"
 
# Change to this
input_layer = "Mul"
output_layer = "final_result"

Once that’s done just rerun your script and it should all work. Thanks to the following post for the solution: https://github.com/tensorflow/tensorflow/issues/12736

Tensorflow – No such file or directory

Hey guys,

Just a quick post on how to resolve an error I came across while testing out tensorflow:

Traceback (most recent call last):
  File "C:\Users\Chris-PC\Desktop\images-to-use\attempt2\tensorflow\examples\label_image\label_image.py", line 112, in <module>
    graph = load_graph(model_file)
  File "C:\Users\Chris-PC\Desktop\images-to-use\attempt2\tensorflow\examples\label_image\label_image.py", line 30, in load_graph
    with open(model_file, "rb") as f:
FileNotFoundError: [Errno 2] No such file or directory: 'tensorflow/examples/label_image/data/inception_v3_2016_08_28_frozen.pb'

All you need to do is download the following file and place it in the directory in the error message: https://storage.googleapis.com/download.tensorflow.org/models/inception_v3_2016_08_28_frozen.pb.tar.gz

Raspberry PI Keeps Booting into the Login Screen

Hey everyone,

A bit of weird issue today – my RaspberryPi kept reverting to the login screen. To get around this, open command prompt from the login screen (ctrl + f1) and then runĀ sudo rm ~/.Xauthority

Reboot and then it should work normally.

 

Exit Raspberry Pi Camera Preview

Hey everyone,

I ran into a bit of a weird issue with a raspberry pi camera preview today. After starting the preview I hit an uncaught exception which meant that exitPreview was never called.

To get around this use the terminal hotkey and kill the python process. Note that while you won’t be able to see the terminal, it will be running in the background.

https://www.raspberrypi.org/forums/viewtopic.php?t=152239&p=998212
ctrl + alt + t
pkill python
pkill python3

Unable to Access RDS Database from Elastic Beanstalk Application

Hey everyone,

I ran into a bit of an issue today where I was unable to access my RDS SQL Express instance from my .NET Elastic Beanstalk instance. I was receiving the following error:

1
The server was not found or was not accessible.

The solution turned out to be fairly simply thanks to this StackOverflow post: http://stackoverflow.com/a/33207022/522859

Get your server instance security group:
– Log into AWS
– Navigate to elastic beanstalk
– Open your application instance
– Open configuration
– Open instances
– Find “server” on the page and copy the value in the “EC2 security groups” field

Add your server instance security group to your rds rules:
– Navigate to the RDS Dashboard
– Open your RDS instance
– Click on view details (left hand side or top)
– Find Security and Network
– Click on the rds-launch-wizard under security groups
– Click on inbound rules (very bottom currently)
– Add a new inbound rule with the copied security group as the source