Known Daphne Bugs and Problems as of 10-Feb-88                      Page 1


           -  Acquisition Program (NSSORT) and Multibus Interface

              The acquisition program (NSSORT) should not be aborted while event
              processors  may be transmitting data to it.  If it is necessary to
              abort the acquisition program use the following steps:

               -  Reset the processors by cycling power to the  Multibus  or  by
                  hitting  the  "Multibus  Reset" button on one of the processor
                  boards.

               -  Use $KLSORT ("Kill Sort") to stop the acquisition program

               -  If  $KLSORT  fails  use   $STOP/ID   as   described   in   the
                  Experimenter's Guide.

              Intermittent Problem with Scalers

           -  $RES

              One cannot use $RES when a tape process is active.   Use  $KLT  to
              kill the tape process before using the $RES command.

           -  $TAPE/OUT with scalers

              The tape output process writes out the  scaler  information  as  a
              single block without regard to the /REC qualifier of the $TAPE/OUT
              command.   Each  scaler   module   which   is   defined   requires
              approximately 1000 bytes.  This could cause problems for users who
              require a small tape  block  size  but  have  a  large  number  of
              scalers.

           -  $NFF Compiler Bugs

              The $NF77 cross-compiler crashes when generating debug information
              for arrays dimensioned (*):

                          subroutine s (array) 
                          integer*4 array (*) 
                          call t (array) 
                          return  
                          end  
              Do not use equivalence for  local  variables.   If  you  must  use
              equivalence place the variables in a COMMON block.

              Do not use MIN and MAX when the arguments are  of  different  data
              types (for instance INTEGER*2 and INTEGER*4).

           -  Interaction Between Tape Units

              Under some circumstances an I/O operation on one Massbus tape unit
              (such  as the DEC TU78) will prevent a second tape unit from doing
              I/O until the operation on the first drive completes.   When  this
              happens acquisition can be slowed down because of the interference
              with data being recorded on tape.