TypeError: Cannot read property Philipps Hue

bugs
1

Hello,
I am currently trying to use the vuforia spatial toolbox with the Philips Hue system. Sadly I am running into an error that leads to a shutdown of my edge server as soon as the image target of a lamp gets recongnized. My Edge Server is installed on a Raspberry Pi 4 OS Ubuntu Server 20.04 lts. I realy struggle to understand the Error message. I attach a screenshot of the whole message, so maybe someone can make sense out of it.

2021-04-09_09-47-47
2021-04-09_09-47-47840×108 52 KB

2

Hi @SidneyFielitz can you share some more console logs?
Shortly before this error message you should see the following message:
reality editor subscription for object: ...
Can you share the logs starting with this message and everything that follows until your error?

3

Hi thanks for replying. I will attach the console log. So far i was able to prevent the server from crashing by adding a Try Catch argument within the server.js. Now I dont get the console log exactly like above anymore. But i still get the error 'cannot read property ’ ’ of undifiened ’

image
image1226×785 51.1 KB

4

Can you tell me the version of Socket.io that you are using? You can find that in the folder node_modules/socket.io/package.json “version”:

I am asking this question, because Toolbox is currently using Socket.io 2.2.0 and according to the socket.io documentation you would get exactly this error message with anything 3.x and 4.x.

5

It says 4.0.1. I do not know when i activly installed that. But when i get you right you say i should downgrade the version to 2.2.0 somehow?

6

A quick fix is,

  1. to make sure that the package.json file in the server folder is identical with the one from github: vuforia-spatial-edge-server/package.json at cbb0d29e4ca2334b8d22187b1501df71f993ec0b · ptcrealitylab/vuforia-spatial-edge-server · GitHub
  2. delete the node_modules folder and execute npm install within the terminal again.

This should make sure that you have all the right libraries installed.

7

I did. But when i look up the socket.io version it still says 4.0.1

8

You might want to execute via terminal
npm install socket.io@2.2.0
In your server folder.

9

I found it. Sorry for being a bit slow but linux and nodejs is quite new to me. I copied the package.json which you linked manualy to my spatial edge server. For some reason the version of socket.io within mine was 4.0.1. Then i removed the whole stuff and reinstalled. Now the correct version of socket.io is installed and i do not get the Error anymore. Thanks for helping out!

10

wonderful!