I was working on the Basic tutorials of ImageModeler, and I was confused on how to extract the texture for the mask model.  I followed all the steps, and when I selected all the faces and click on Extract Plane, it gave me a message saying that "Texture Extraction aborted. Unable to save image in Working Directory.  Check that the specified directory exists and that you have the permissions to write to it."   So it didn't really extract the texture for me when I went to display the texture..  So can you help me how to solve this problem?  How to extract the texture and to be viewable after the texture icon is pressed.

hello,
you should set the temporary directory (Edit - Preferences - Temporary directory) to a directory where you have full write permissions. Then it should work better.
 
Cheers.