Contact tolerance in Creo 2C

Hi all,

when you start a non linear analysis, the default tolerance at which each step the program tends, is 1e-14.

In WF5 you could modify this parameter inserting a windows environment variable called "MSE_CONTACT_TOLERANCE_FACTOR", as you can see at page 22 in the attached pdf.
This thing does not work with creo 2.
I don't find anything in the help.

Thanks.
Regards