A transformation configuration has .tc as a file
name extension and is located in the Eclipse workspace. To edit an existing
transformation configuration, in a view that shows the workspace resources,
double-click a transformation configuration file, which opens the transformation
configuration editor.
Check the Problems view for error
or warning messages after you save changes to a transformation configuration
file. Depending on the error or warning that is displayed, you might not be
able to run the transformation, or the transformation might generate unexpected
output.