STD.File.SetExpireDays(lfn, expireDays )
| lfn | A string containing the logical name of the file. | 
| expireDays | Number of days before the file expires. Setting to 0 specifies to use the system's default expire value (specified in the Sasha server's ExpiryDefault attribute). | 
The SetExpireDays action sets a logical file's expiration criteria (the expireDays attribute). The file is deleted by the Sasha server when a file has not been accessed for the number of days specified.
Example:
STD.File.SetExpireDays('~samples::myscope::myfile',30);
 //file expires and is deleted after 30 days w/o access
See Also: GetExpireDays, ClearExpireDays