Meteor run error in windows after code changes -- meteor v1.3.2.4


I am running meteor v1.3.2.4 on Windows. I made some code changes and it shows the following stack trace when I start meteor. This is happening after adding some server code – is this a red herring or not discovering the root cause that could be related to the code I added? Thanks in advance.

throw error;
Error: EPERM, operation not permitted 'C:…meteor\local\build\programs\web.browser\packages\underscore.js’
at Object.fs.statSync (fs.js:696:18)
at Object.wrapper [as stat] (C:\tools\fs\files.js:1368:35)
at C:\tools\fs\files.js:466:43
at Array.forEach (native)
at Function..each..forEach (C:…meteor\packages\meteor-tool\1.3.2_4\\dev_bundle\lib\node_modules\underscore\underscore.js:79:11)
at Object.files.cp_r (C:\tools\fs\files.js:453:5)
at C:\tools\fs\files.js:468:13
at Array.forEach (native)


I got this issue resolved by shutting down mongo console, which seems to have caused an issue with backend interaction.