Here is the very simple script to delete the unwanted columns.
names default to here(1);
dt=current data table();
dt << delete columns("I-delai", "I-durée", "I-pos",
"R-delai", "N°-Rec", "E-durée", "TR-max", "TM-max",
"code-PP", "cod-R-d");
The details are covered in the scripting index
Help==>Scripting Index
To get started with scripting, I suggest you read the Scripting Guide
Help==>JMP Documentation Library==>Scripting Guide
Jim