Import user records from CSV failed

[Willox]

Hello Cyclosians,
I am failing to import user records from a csv file. I followed the wiki "Import quick steps".

I am using the following structure for the CSV file:

"user","field.internalName1", "field.internalName2", "field.internalName3"
"paul","value1","value2","value3"
"jean","value4","value5","value6"

Cyclos is refusing to import the fields of the user record and saying "Ignore field.internalName1, field.internalName2, field.internalName3"

Which permissions should I check please?

Regards

William