Guessed and Gmayor: Thanks to both of you for your replies! It's really appreciated!!

Guessed :here are the answers to yours questions:
Question #1: Yes the macros reside in the document so it's not a problem of uninstalled template.
Question #2: Yes the macros security on the machine with the problem enable all macros to run on the computer... So it should be running without any problems...
Question # 3: Yes the user can go to the options "Show/hide" hidden text but the macros need to work because I also have a print button to print specific sections and I also have a button for calculation field. Temporarily, we used this option but I need to fix the problem...

Gmayor: I have asked the user with the problem to delete "%Temp%" files and I'm waiting his feedback... hopefully it will work... I'm crossing my fingers... I will let you know as soon as he comes backs to me...

Thanks again to both of you for your kind help,

Bouclesdor