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vimvimacvimnerdtree

vim "modifiable" is off

I am trying to create a new file with NERDTree. I hit the a key to create a new file and I get the message:

E21: Cannot make changes, 'Modifiable' is off

I'm using MacVim with Janus (almost out of the box).

Solution 
  • :set ma

    which is short for 

    :set modifiable

    will make a buffer modifiable. And

    :set noma

    does the opposite.