Thanks Francois for answer.
In fact i use my own numerical control wich is made originaly for high speed milling. And in the "standard" (or more common) iso code for milling machines E is not a accepted as axis name letter. E is used for Local variables for example. For my test i use a brushless motor for extrusion and i need to manage an axis for this. If you are interested by the results, i can show you . For now i am building an extruder wheel because the motor is 8 mm diameter.
For your remark, can i use the replace.csv or do you mean to make replace in an text editor ?. My wish was for example to have somewhere parameters to name the axis as we would like to have.
Regards
Marc