IBM SC34-6814-04 - Manual (Page 470)

v AFCW, indicating that the transaction abended due to a VSAM-detected
deadlock (RLS only).
The source of the CICS-supplied default transaction restart program, DFHREST, is
supplied in assembler language only, in the CICSTS32.CICS.SDFHSAMP library.
The assembler copybook for mapping the communications area is in the
CICSTS32.CICS.SDFHMAC library.
448 Customization Guide