Issue with rhinoscriptsyntax lib

Hello,

I use python script with custom buttons, but when I use rhinoscriptsyntax the content of the folder “Plug-ins/IronPython (814d908a-e25c-493d-97e9-ee3861957f49)/settings/lib/rhinoscript/…” is deleted and I can’t use rhinoscript anymore.

_-NoEcho
-_RunPythonScript (
import rhinoscriptsyntax as rs

…script…

)

Have you any idea why ?
Thank you for your help
Antoine