The SMP/4 Messages and Codes manual has been uploaded to Softlib.org along with another Sysgen Manual ( MVS/370 ).
GC26-4063-3 MVS/370 Installation: System Generation
GC38-1047-0 OS/VS System Modification Program Messages and Codes
Links or directories for manuals below have been corrected as well.
GA32-0039-2 IBM Input/Output Device Summary
GC27-6987-6 Introduction to VTAM: VTAM Level 2
GH12-5130-0 VSE/Access Control - Logging and Reporting
SC28-6864-0 FORTRAN IV Mathematical and Service Subprograms
SC33-6107-0 VSE/Advanced Function System Information
Phil