Why do I get the following error message when I try to edit a source code file?

  File '/../../filename.c' is read-only.  Do you wish to make 
  it writable?
  
  

You get this error message because the file that you are trying to edit is read-only. If you do not want to make it writable then select No . If you want to find out the settings for this file, follow steps below:

1. From the CodeWarrior Projects window, right-click on the source file.

   A context menu appears.

2. From context menu, select Properties .

   The Properties window appears.

3. Select Resource .

On the right-hand side, the settings for the file appear.