Mailing WORD-EXCEL Social Security Number

Hello everyone,

I apologize a thousand times as I know the question has been asked X times!! Unfortunately, I haven't been able to apply the proposed solutions, notably that of M@rina:

{set c1 {= INT ({MERGEFIELD SECU}/100) } }
{set c2 {= MOD ({MERGEFIELD SECU};100) } }
{ c1 \# "# ## ## ## ### ### "} {c2}

When I'm on my Word mail merge and I press ALT + F9 on my social security field, it displays like this:

{ MERGEFIELD "N_SECURITE_SOCIALE" }

What I don't understand is when to enter the 3 lines indicated above and above all, should I leave the line break?

In other words, is it correct to write this? :

{set c1 {= INT ({MERGEFIELD SECU}/100) } }
{set c2 {= MOD ({MERGEFIELD SECU};100) } }
{ c1 \# "# ## ## ## ### ### "} {c2}

Because when I try to enter this formula in the gray area of my field, and I refresh with F9, I no longer have any data...

Thank you so much for your help!!!

Afeda.