I have been using version 5.0 for a while and I am not an expert I feel comfortable with it, I decided to give version 7 a try. I started with the Optimus framework. I followed the instructions video to install the “hello otimus” first step. when I typed npm start and opened http://localhost:8080/ nothing showed up on the screen. How do I troubleshoot the problem? The console say "SCRIPT5009: ‘DHX’ is underfined
thanks
DHTMLX Optimus requires the files of the DHTMLX Suite library as dependencies. Thus, you’ll need to add js/css files of DHTMLX Suite to provide the correct work of DHTMLX Optimus.
You may download the ready basic configured app from github:
Also, there is a detailed tutorial here:
I followed the step and download the file from github
and I get the following
D:\XAMPP\htdocs\dhtmlx-opt>npm install
npm WARN deprecated source-map-url@0.4.1: See https://github.com/lydell/source-map-url#deprecated
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated source-map-resolve@0.5.3: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependencies
npm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependencies
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated querystring@0.2.0: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated @babel/polyfill@7.12.1: 
This package has been deprecated in favor of separate inclusion of a polyfill and regenerator-runtime (when needed). See the @babel/polyfill docs (https://babeljs.io/docs/en/babel-polyfill) for more information.
npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated css-mqpacker@7.0.0: Package no longer supported. Contact support@npmjs.com for more info.
npm WARN deprecated svgo@1.3.2: This SVGO version is no longer supported. Upgrade to v2.x.x.
npm WARN deprecated tar@2.2.2: This version of tar is no longer supported, and will not receive security updates. Please upgrade asap.
npm WARN deprecated core-js@2.6.12: core-js@<3.4 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Please, upgrade your dependencies to the actual version of core-js.
npm ERR! code 1
npm ERR! path D:\XAMPP\htdocs\dhtmlx-opt\node_modules\node-sass
npm ERR! command failed
npm ERR! command C:\Windows\system32\cmd.exe /d /s /c node scripts/build.js
npm ERR! Building: D:\nodejs\node.exe D:\XAMPP\htdocs\dhtmlx-opt\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
npm ERR! gyp info it worked if it ends with ok
npm ERR! gyp verb cli [
npm ERR! gyp verb cli ‘D:\nodejs\node.exe’,
npm ERR! gyp verb cli ‘D:\XAMPP\htdocs\dhtmlx-opt\node_modules\node-gyp\bin\node-gyp.js’,
npm ERR! gyp verb cli ‘rebuild’,
npm ERR! gyp verb cli ‘–verbose’,
npm ERR! gyp verb cli ‘–libsass_ext=’,
npm ERR! gyp verb cli ‘–libsass_cflags=’,
npm ERR! gyp verb cli ‘–libsass_ldflags=’,
npm ERR! gyp verb cli ‘–libsass_library=’
npm ERR! gyp verb cli ]
npm ERR! gyp info using node-gyp@3.8.0
npm ERR! gyp info using node@16.13.2 | win32 | x64
npm ERR! gyp verb command rebuild []
npm ERR! gyp verb command clean []
npm ERR! gyp verb clean removing “build” directory
npm ERR! gyp verb command configure []
npm ERR! gyp verb check python checking for Python executable “python2” in the PATH
npm ERR! gyp verb which failed Error: not found: python2
npm ERR! gyp verb which failed at getNotFoundError (D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:13:12)
npm ERR! gyp verb which failed at F (D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:68:19)
npm ERR! gyp verb which failed at E (D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:80:29)
npm ERR! gyp verb which failed at D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:89:16
npm ERR! gyp verb which failed at D:\XAMPP\htdocs\dhtmlx-opt\node_modules\isexe\index.js:42:5
npm ERR! gyp verb which failed at D:\XAMPP\htdocs\dhtmlx-opt\node_modules\isexe\windows.js:36:5
npm ERR! gyp verb which failed at FSReqCallback.oncomplete (node:fs:198:21)
npm ERR! gyp verb which failed python2 Error: not found: python2
npm ERR! gyp verb which failed at getNotFoundError (D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:13:12)
npm ERR! gyp verb which failed at F (D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:68:19)
npm ERR! gyp verb which failed at E (D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:80:29)
npm ERR! gyp verb which failed at D:\XAMPP\htdocs\dhtmlx-opt\node_modules\which\which.js:89:16
npm ERR! gyp verb which failed at D:\XAMPP\htdocs\dhtmlx-opt\node_modules\isexe\index.js:42:5
npm ERR! gyp verb which failed at D:\XAMPP\htdocs\dhtmlx-opt\node_modules\isexe\windows.js:36:5
npm ERR! gyp verb which failed at FSReqCallback.oncomplete (node:fs:198:21) {
npm ERR! gyp verb which failed code: ‘ENOENT’
npm ERR! gyp verb which failed }
npm ERR! gyp verb check python checking for Python executable “python” in the PATH
npm ERR! gyp verb which succeeded python C:\Python310\python.EXE
npm ERR! gyp ERR! configure error
npm ERR! gyp ERR! stack Error: Command failed: C:\Python310\python.EXE -c import sys; print “%s.%s.%s” % sys.version_info[:3];
npm ERR! gyp ERR! stack File “”, line 1
npm ERR! gyp ERR! stack import sys; print “%s.%s.%s” % sys.version_info[:3];
npm ERR! gyp ERR! stack ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
npm ERR! gyp ERR! stack SyntaxError: Missing parentheses in call to ‘print’. Did you mean print(…)?
npm ERR! gyp ERR! stack
npm ERR! gyp ERR! stack at ChildProcess.exithandler (node:child_process:397:12)
npm ERR! gyp ERR! stack at ChildProcess.emit (node:events:390:28)
npm ERR! gyp ERR! stack at maybeClose (node:internal/child_process:1064:16)
npm ERR! gyp ERR! stack at Process.ChildProcess._handle.onexit (node:internal/child_process:301:5)
npm ERR! gyp ERR! System Windows_NT 10.0.14393
npm ERR! gyp ERR! command “D:\nodejs\node.exe” “D:\XAMPP\htdocs\dhtmlx-opt\node_modules\node-gyp\bin\node-gyp.js” “rebuild” “–verbose” “–libsass_ext=” “–libsass_cflags=” “–libsass_ldflags=” “–libsass_library=”
npm ERR! gyp ERR! cwd D:\XAMPP\htdocs\dhtmlx-opt\node_modules\node-sass
npm ERR! gyp ERR! node -v v16.13.2
npm ERR! gyp ERR! node-gyp -v v3.8.0
npm ERR! gyp ERR! not ok
npm ERR! Build failed with error code: 1
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\raymond.barlow\AppData\Local\npm-cache_logs\2022-03-14T22_06_49_467Z-debug.log
In case of using the node v.16 please, try to remove the node-sass modules from the package.json of the optimus app (just clear the strings #24 and #21), as it is not supported anymore.
Otherwise please, try to use the node.js v.14 or less.
We’ll try to update the started app in the near future.
I removed strings 24 and 21 and still did not work. Also, I do not want to downgrade to node.js v14 as I do not know how it would affect other systems/code. I guess I need to wait for the update. thanks
I’ve provided an update in your second topic:
https://forum.dhtmlx.com/t/dhtmlx-widgets-node-js-warning-during-install/73868/8
Also, we’ve already added the similar update to the official demo package.