Error launching MATLAB on Neovim

[MiuKaShi]

System: ArchLinux

Editor: nvim with matlab_ls

Matlab version: R2023b

Matlab-language-server version: 1.1.7

Problem:

fail to launch matlab

(18:50:03) matlabls: Log Directory: /tmp/matlabls_10926
(18:50:03) matlabls: Launching MATLAB...
(18:50:03) matlabls - ERROR: Error launching MATLAB: spawn matlab ENOENT
(18:50:03) matlabls - ERROR: Error launching MATLAB: Error
(18:50:03) matlabls - ERROR: Error launching MATLAB: Error: spawn matlab ENOENT
    at ChildProcess._handle.onexit (node:internal/child_process:286:19)
    at onErrorNT (node:internal/child_process:484:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
(18:50:03) matlabls: MATLAB process terminated

Works fine 2 months ago, but failed after updating Matlab-language-server

[byfarm]

I am getting a similar error

(08:12:50) matlabls: Launching MATLAB...
(08:12:50) matlabls - ERROR: Error launching MATLAB: spawn matlab ENOENT
(08:12:50) matlabls - ERROR: Error launching MATLAB: Error
(08:12:50) matlabls - ERROR: Error launching MATLAB: Error: spawn matlab ENOENT\n    at Process.ChildProcess._handle.onexit (node:internal/child_process:283:19)\n    at onErrorNT (node:internal/child_process:478:16)\n    at processTicksAndRejections (node:internal/process/task_queues:83:21)
(08:12:50) matlabls: MATLAB process terminated
[DEBUG][2023-12-08 08:12:50] .../vim/lsp/rpc.lua:387	"rpc.receive"	{  jsonrpc = "2.0",  method = "matlab/connection/update/server",  params = {    connectionStatus = "disconnected"  }}

I am using matlab version R2023a
I am running WSL2 with Ubuntu
Editor: Neovim with matlab_ls
`

[rkmiec]

Can you try to open terminal inside of your nvim session (enter :terminal in neovim) and then execute matlab -nodisplay?
Are you using mason.nvim for LSP configuration or lspconfig directly?
Could you paste relevant configuration part of your neovim config?

[byfarm]

Thank you so much!!!!
The problem was that I am using MATLAB in WSL, so I had matlab installed on windows, but not on wsl. I downloaded and installed the Linux version of matlab on wsl, and it worked! I had to change my installation path to the one bellow.

' installPath = "/usr/local/MATLAB/R2023a",'

Thank you!

[MiuKaShi]

I can

Can you try to open terminal inside of your nvim session (enter :terminal in neovim) and then execute matlab -nodisplay? Are you using mason.nvim for LSP configuration or lspconfig directly? Could you paste relevant configuration part of your neovim config?

I can successfully run matlab -nodisplay in neovim terminal.

I configured lsp directly with the following configuration

  require("lspconfig").matlab_ls.setup {
    on_attach = on_attach,
    capabilities = capabilities,
    cmd = { "matlab_ls", "--stdio" },
    filetypes = { "matlab" },
    single_file_support = true,
    settings = {
      matlab = {
        indexWorkspace = false,
        installPath = "/home/miuka/.local/MATLAB/R2024a",
        matlabConnectionTiming = "onStart",
        telemetry = true,
      },
    },
  }

for matlab_ls is a bash shell

exec node "/home/miuka/github/MATLAB-language-server/out/index.js" "$@"

I tried to switch to the nvim-nightly version, but it still doesn't work and get

(18:43:51) matlabls - ERROR: Error launching MATLAB: Error
(18:43:51) matlabls - ERROR: Error launching MATLAB: Error: spawn matlab ENOENT
    at ChildProcess._handle.onexit (node:internal/child_process:286:19)
    at onErrorNT (node:internal/child_process:484:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
(18:43:51) matlabls: MATLAB process terminated

[rkmiec]

I tried to switch to the nvim-nightly version, but it still doesn't work and get

(18:43:51) matlabls - ERROR: Error launching MATLAB: Error
(18:43:51) matlabls - ERROR: Error launching MATLAB: Error: spawn matlab ENOENT
    at ChildProcess._handle.onexit (node:internal/child_process:286:19)
    at onErrorNT (node:internal/child_process:484:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
(18:43:51) matlabls: MATLAB process terminated

I have tried to reproduce your issue on my system (native Linux), but I couldn't.
My setup was very similar to yours.
I have intentionally skipped a few steps or messed up my config but every time I get a different error.

Could you start with a clean repo once again? This is what I'm doing to have this language server working:

git clean -fdX
git pull --rebase
npm install webpack
npm run-script vscode:prepublish

[MiuKaShi]

git clean -fdX
git pull --rebase
npm install webpack
npm run-script vscode:prepublish

I have try above and even clone a clean master source, but it still failed and get same error.
I also try Helix, almost same config it work on helix, but switch to neovim get error.
How about node version, my current node version is V21.6.1.

[rkmiec]

I'm using the same node version and npm 10.2.4. Which Matlab version are you running? Currently, I'm on R2022b.

[MiuKaShi]

I'm using the same node version and npm 10.2.4. Which Matlab version are you running? Currently, I'm on R2022b.

I switched the npm version to 10.2.4 and tested matlab R2022b R2023b R2024a, and neovim-nightly version, but they all failed!
I even tested other people's nvim configurations on github , but also got the same error as before.

[a1gituser]

Hello,

I"m using neovim nightly v0.9.5 via WSL 2 on Arch Linux. I have gone through most of the issues above, but have been able to resolve most by installing Matlab locally in the Linux WSL. I can see from the logs that the server goes up, and it connects to it after I open a matlab file. The issue I have is that a few seconds later I get a message that the client quit:

and the lsp.log file contains a very large output, but the top of the error there is

[ERROR][2024-02-15 11:31:46] .../vim/lsp/rpc.lua:734 "rpc" "/home/rln/.local/share/nvim/mason/bin/matlab-language-server" "stderr" '),function(e){e.fromPlainText=function(e){return e.replace(/[\\`*_{}\ --- output truncated

:LspInfo looks healthy enough for me

I should add I tested Matlab R2021b and R2023b. Both have the same behavior.

Any suggestions on how to do next to fix this?

thanks!

[a1gituser]

Hello,

I"m using neovim nightly v0.9.5 via WSL 2 on Arch Linux. I have gone through most of the issues above, but have been able to resolve most by installing Matlab locally in the Linux WSL. I can see from the logs that the server goes up, and it connects to it after I open a matlab file. The issue I have is that a few seconds later I get a message that the client quit:

and the lsp.log file contains a very large output, but the top of the error there is

[ERROR][2024-02-15 11:31:46] .../vim/lsp/rpc.lua:734 "rpc" "/home/rln/.local/share/nvim/mason/bin/matlab-language-server" "stderr" '),function(e){e.fromPlainText=function(e){return e.replace(/[\`*_{}\ --- output truncated

:LspInfo looks healthy enough for me

I should add I tested Matlab R2021b and R2023b. Both have the same behavior.

Any suggestions on how to do next to fix this?

thanks!

I was able to get this going on my side by using mason-lspconfig, installing matlab locally on my wsl linux install, and executing neovim disabling the proxies (I'm using a corporate laptop) using the alias mvim='(unset http_proxy && unset https_proxy && nvim)'

my config (using lazyvim) looks like this. This could probably be cleaner, but this is working for me. I'm no expert on this, unfortunately, but just posting what I did that got things going for me. I also installed matlab_ls via Mason manually, but could've probably added it to the config below.

    {
        "neovim/nvim-lspconfig",
        dependencies = {
            "williamboman/mason.nvim",
            "williamboman/mason-lspconfig.nvim",
            "hrsh7th/cmp-nvim-lsp",
            "hrsh7th/cmp-buffer",
            "hrsh7th/cmp-path",
            "hrsh7th/cmp-cmdline",
            "hrsh7th/nvim-cmp",
            "L3MON4D3/LuaSnip",
            "saadparwaiz1/cmp_luasnip",
            "j-hui/fidget.nvim",
        },

        config = function()
            local cmp = require('cmp')
            local cmp_lsp = require("cmp_nvim_lsp")
            local capabilities = vim.tbl_deep_extend(
            "force",
            {},
            vim.lsp.protocol.make_client_capabilities(),
            cmp_lsp.default_capabilities())

            require("fidget").setup({})
            require("mason").setup()
            require("mason-lspconfig").setup({
                ensure_installed = {
                    "lua_ls",
                    "rust_analyzer",
                    "clangd",
                    --"tsserver",
                    --"codelldb",
                    --"jedi-language-server",
                    --"pyright",
                },
                handlers = {
                    function(server_name) -- default handler (optional)

                        require("lspconfig")[server_name].setup {
                            capabilities = capabilities
                        }
                    end,

                    ["lua_ls"] = function()
                        local lspconfig = require("lspconfig")
                        lspconfig.lua_ls.setup {
                            capabilities = capabilities,
                            settings = {
                                Lua = {
                                    diagnostics = {
                                        globals = { "vim", "it", "describe", "before_each", "after_each" },
                                    }
                                }
                            }
                        }
                    end,
                }
            })

            local cmp_select = { behavior = cmp.SelectBehavior.Select }

            cmp.setup({
                snippet = {
                    expand = function(args)
                        require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
                    end,
                },
                mapping = cmp.mapping.preset.insert({
                    ['<C-p>'] = cmp.mapping.select_prev_item(cmp_select),
                    ['<C-n>'] = cmp.mapping.select_next_item(cmp_select),
                    ['<Tab>'] = cmp.mapping.confirm({ select = true }),
                    ["<C-Space>"] = cmp.mapping.complete(),
                }),
                sources = cmp.config.sources({
                    { name = 'nvim_lsp' },
                    { name = 'luasnip' }, -- For luasnip users.
                }, {
                    { name = 'buffer' },
                })
            })

            vim.diagnostic.config({
                -- update_in_insert = true,
                float = {
                    focusable = false,
                    style = "minimal",
                    border = "rounded",
                    source = "always",
                    header = "",
                    prefix = "",
                },
            })
        end
    },

[Budali11]

I encountered this error too.
my environment:

1. matlab R2023a student version installed.
2. nvim version v0.11.0
   
3. nvim plugins:
   mason.nvim
   mason-lspconfig.nvim
   neovim/nvim-lspconfig
   hrsh7th/cmp-nvim-lsp
   hrsh7th/cmp-buffer
   hrsh7th/cmp-path
   hrsh7th/cmp-cmdline
   hrsh7th/nvim-cmp

my error:

my procedure to solve:

1. MATLAB may should be correctly installed and licensed.
2. use mason to install matlab-language-server
3. setup nvim-lspconfig(but this seems no effect, because when i modify the settings such as "require(...).matlab_ls..." to "require(...)matlab_s...", matlab_ls is still attach to language server and work properly)
   
4. comment the mason.nvim and mason-lspconfig.nvim in .config/nvim/lua/plugins.lua, namely unload these two plugins, and then the matlab_ls works.

it sounds weird but it really works for me.