ACADPREFIX (System Variable)

Lists the Support File Search paths specified in the Options dialog box, Files tab.

(Read-only)
Type:String
Saved in:Not-saved
Initial value:Varies

The Support File Search paths are stored in the ACAD operating system environmental variable. In addition to the Options dialog box, you can use the AutoLISP functions, getenv and setenv, to access these search paths. For example, from within an AutoLISP routine or from the Command prompt, you can use (getenv "ACAD") to list the Support File Search paths.