creo4 config.pro option documentation for: INTF_OUT_ASM_MAPPED_ITEM 
(hidden)
set_trail_single_step
no
*
, yes
Enables a trail file to be single-stepped by pressing ENTER.
Specifies the file name of default mold manufacturing model template. After you set this option, it takes effect immediately in the current session.
When set to empty
, no template is used.