You can use the /FILNAME command at the Begin level to assign a jobname for all subsequently written files.
Issue the /ASSIGN command to assign a different name, extension, and directory to a file.
Example 19.4: Assigning File Names
This command reassigns the element matrix file (identifier emat) to MYFILE.dat in the SAVE_DIR directory:
/ASSIGN,EMAT,SAVE_DIR/MYFILE,DAT,SAVE_DIR/
The "/" is a delimiter separating the directory name (SAVE_DIR) from the file name (MYFILE). The delimiter is system-dependent; therefore, use the delimiter(s) appropriate for your system.
You can assign only a specific set of files. See the /ASSIGN command description for the complete list.