I always copy it (save) to the existing calc_pids.txt file (thats called overwriting). If you just Save it to user Configuration..it will not work.
Whether you pull it from the System Tab I.E. Calculated, Tune, Tuning..depends on the the 'System' is was saved to. In the Example below..the System was "TUNING".
# ================================================== ============================
*PRN - Parameter Reference Numbers
# --------------------------------
# See sae_generic.txt for more information on the *PRN section
#
#Code PRN SLOT Units System Description
#------------------------- ---- ------------ ---------------- ---------------- ------------------------------------------
CALC.CL F032 CLC-00-032 factor Tuning "Closed Loop (based on EQIVRATIO)"
Hope that helps.