Error (1): Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (9 tries left)

Question

I am trying for flutter doctor and the following error was shown

Running pub upgrade...
The system cannot find the path specified.
Error (1): Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (9 tries left)

Waiting for 2 seconds, press CTRL+C to quit ...
Terminate batch job (Y/N)?

the above initializing was shown for 4 hours. What may be the issue? Can anyone please help with this

Solution

I fixed that by:

1. Ctrl+C to stop infinite error loop.
2. Kill the Dart process in Windows Task Manager.
3. Delete the cache folder located in flutter/bin directory.
4. Run in command line flutter pub cache repair.
5. Run flutter doctor

Comments

[Ravindra S. Patil]

which OS you used Mac or Windows?

[G H Prakash]

windows 10. Can you please help me with this

[Hardik Mehta]

You can try this link : stackoverflow.com/questions/49497109/…

[Abhijith]

download latest version from flutter.dev and extract it somewhere and and use that path in your project and and do it globaly by updating new path in environment variable setting.also make sure you have stable connection when upgrading or updating packages

[G H Prakash]

Any body please..

[G H Prakash]

there is no Dart process in task manager

[G H Prakash]

No use. anyways thanks for the reply