Details
During placement of Standard Parts into an assembly you have the option 'Copy to Working Folder' in the lower right corner. That option in the PartFinder menu is sometimes checked and greyed out so it cannot be unchecked.
Solution
You cannot uncheck this option when placing pipes or frames but you can still choose to use the assembly folder as the working folder which is the option next to the inactive 'Copy to Working Folder' option.
Hardware/Software Configuration
Platform: INTL64
OS: window
OS Version: 1064
Product: SOLID_EDGE
Application: APPLICATION
Function: STANDARD_PARTS
Ref: 002-8007180