FileNameUnset

This error means that you tried to save a Node, but initialized it with raw data and never set a filename. To fix this,this, see Changing the active file, or set the filename parameter on the save function to save temporarily (see Saving).

Here's an example:

x = Node()
x.get('test')
# or
x.test

Output:

<RootNode>.testYou doeshave not existspecified a filename for this data.

Try

The error message will always writesetting the textfilename <RootNode>parameter sinceor theuse method returning will not be able to determine what you have named the variable containing the Node object. For more information, see Terminology.switch_to_file.