Node.js v 0.12.1

[dudanisu]

I tried to load server using the tutorial but it gives error;

C:\Program Files\nodejs\node_modules>node
> var opcua = require("node-opcua")
FAST: using node-expat
undefined
C:\Program Files\nodejs\node_modules>node
> var opcua = require("node-opcua")
FAST: using node-expat
undefined
> var server = new opcua.OPCUAServer({ port:4334 });

[erossignon]

Hi, you probably need to put the command into a file and execute it. In mytest_server.js

var opcua = require("node-opcua")
var server = new opcua.OPCUAServer({ port:4334 });
...

(see https://github.com/node-opcua/node-opcua/blob/master/documentation/sample_server.js for instance )

and run it this ways node mytest_server.js

[dudanisu]

When I load node-opcua on my Ubuntu computer, I get a error npm-debug.log:

0 info it worked if it ends with ok
1 verbose cli [ '/usr/bin/node', '/usr/bin/npm', 'install' ]
2 info using npm@1.4.28
3 info using node@v0.10.38
4 verbose node symlink /usr/bin/node
5 verbose config Skipping project config: /home/cs240/.npmrc. (matches userconfig)
6 error install Couldn't read dependencies
7 error package.json ENOENT, open '/home/cs240/package.json'
7 error package.json This is most likely not a problem with npm itself.
7 error package.json npm can't find a package.json file in your current directory.
8 error System Linux 3.2.0-79-generic-pae
9 error command "/usr/bin/node" "/usr/bin/npm" "install"
10 error cwd /home/cs240/node_modules
11 error node -v v0.10.38
12 error npm -v 1.4.28
13 error path /home/cs240/package.json
14 error code ENOPACKAGEJSON
15 error errno 34
16 verbose exit [ 34, true ]

[dudanisu]

Thanks for replying back.

[dudanisu]

To install node-opcua I use the command

/home/sudo npm install node-opcua

[erossignon]

what is /home/sudo ? I guess you mean sudo npm install node-opcua ? Before doing npm install you need to have a valid package.json file in your folder. npm init does this for you.

I would do :

$ mkdir myproject
$ cd myproject
$ npm init
$ npm install node-opcua --save
$ npm install async --save 

then edit a script file like sample_server.js inside my project then

$ node sample_server.js

[dudanisu]

Thanks, the server work now and I can use prosys ua client to see the Myvariable1 data. Thanks again.

[dudanisu]

When I run the same sample_server.js on windows computer, I get this error:

---

initialized Server is now listening ... ( press CTRL+C to stop) port 4334 the primary server endpoint url is opc.tcp://'hostname' is not recognized as a n internal or external command, operable program or batch file.:4334/UA/MyLittleServer

---

Can you please help - the os is windows 8.1. Thanks

[erossignon]

It looks like the standard windows command hostname.exe is missing or is not accessible in your PATH. hostname.exe returns the name of your computer, this name is used to build the end point url of your server. hostname.exe can be found under c:\Windows\system32\ Can you test this in a dos console ?

C:\>  hostname 

[dudanisu]

Thanks, I can now see the opcua server name, however when my client tries to connect I get the error as shown below. Thanks again.

---

D:\adopcuaserver>node sample_server.js

 Warning : your current installation is using ersatz-node-expat a full javascript version of node-expat
           This version is slightly slower than node-expat but doesn't require a C++ build during installation

           You can get slightly better performance if you install node-expat
              $ npm install node-expat

           Note: this may require some additional packages to be installed on your system
Server is now listening ... ( press CTRL+C to stop)
port  4334
 the primary server endpoint url is  opc.tcp://adimadlpt:4334/UA/MyLittleServer
UNSUPPORTED REQUEST !! FindServersRequest
 messages  UNSUPPORTED REQUEST !! FindServersRequest
UNSUPPORTED REQUEST !! FindServersRequest
 messages  UNSUPPORTED REQUEST !! FindServersRequest

[erossignon]

It looks like your client is considering your server to be a discovery server rather than a standard server. discovery server and its FindServersRequest/FindServersResponse transaction are currently not fully implemented on our end. Can you tell me more about your client and its configuration ?

[erossignon]

closing due to lack of activity

[dudanisu]

Erossignon, Thanks for your help, I am now again on this project and as u have mentioned I am trying to do step by step. However it give me the error as shown:

D:\myproject> npm install node-opcua --save
npm ERR! Windows_NT 10.0.10240
npm ERR! argv "C:\\Program Files (x86)\\nodejs\\node.exe" "C:\\Program Files (x86)\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "node-opcua" "--save"
npm ERR! node v5.3.0
npm ERR! npm  v3.3.12
npm ERR! code ENOSELF

npm ERR! Refusing to install node-opcua as a dependency of itself
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     D:\myproject\npm-debug.log
D:\myproject>

[erossignon]

@dudanisu it looks like there is something wrong in your d:\myproject folder, like if node-opcua was already installed in D:\myproject2

Could you try this :

mkdir D:\myproject2
mkdir D:\myproject2\mytest
CD D:\myproject2\mytest
npm init 
npm install node-opcua --save

[erossignon]

closing due to lack of activity.