change to this file were not saved to file system error in google chrome version 30.0.1599.101 m

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In the google chrome version 30.0.1599.101 m i am not able to save the changed js file. On saving the js file i got yellow triangle symbol with "change to this file were not saved to file system" message. I know this used to work in older version

I am using windows-7 64 bit

Click on the cog in the developer tools window (lower right corner)

Go to workspace and add the directory which you would be working on.

This is to accidentally prevent you from modifying files that you did not intend on changing.

Happened to me too. After picking the workspace directory, I also mapped the file from the "Source" panel of Devtools to its filesystem equivalent (using right-click on the file, from the file tree). It solved my problem.