"ncu -g" returns error "Expected JSON from "npm ls --json --global". Received empty response."

[manuelgarciacr]

• I have searched for similar issues
• Node version: v18.20.4
• ncu version latest

---

Hardware information:

• Model: Dell Inc. Latitude E6540
• Memory: 16,0 GiB
• Processor: Intel® Core™ i7-4810MQ × 8
• Grphics: Intel® HD Graphics 4600 (HSW GT2)
• Graphics 1: OLAND
• Disc: 960,2 GB

Software information:

• Firmware version: A27
• SO name: Ubuntu 24.04.1 LTS
• SO Construction: (null)
• SO type: 64 bits
• GNOME version: 46
• Windows system: X11
• Kernel version: Linux 6.8.0-47-generic

Current Behavior

$ ncu --verbose -g
Initializing

Options:
{
  args: [],
  cacheExpiration: 10,
  cacheFile: '~/.ncu-cache.json',
  cli: true,
  concurrency: 8,
  deep: false,
  dep: [ 'prod', 'dev', 'optional', 'packageManager' ],
  deprecated: true,
  errorLevel: 1,
  format: [],
  global: true,
  install: 'prompt',
  json: false,
  loglevel: 'verbose',
  minimal: false,
  packageManager: 'npm',
  registryType: 'npm',
  retry: 3,
  root: true,
  target: 'latest',
  verbose: true,
  workspace: []
}

Getting installed packages
Expected JSON from "npm ls --json --global". Received empty response.

Expected Behavior

Check the latest versions of all global project dependencies:

[raineorshine]

I will need a list of your global dependencies to reproduce.

npm ls -g

[TheMikeyRoss]

Things changed after v18

@manuelgarciacr can you update ncu to the latest version and try again?

[XhmikosR]

This looks like a network issue or something. If we should handle it gracefully, is something we might need to consider.