Include files and the common block VMR

  Your MIDAS application code will certainly contain some calls to MIDAS interfaces to set up the MIDAS environment and possibly to get access to MIDAS data structures. In order to use these interfaces (ST and TB for FORTRAN; SC and TC for C) successfully, the program should contain two include files which declare the system global variables and assign values to these variables. The declaration and assignments for FORTRAN programs ^7.1are in the files:
MID_DISK:['MIDASHOME'.'MIDVERS'.INCL]ST_DEF.INC  and ST_DAT.INC  (in VMS)
or
$MIDASHOME/$MIDVERS/incl/st_def.inc and st_dat.inc (in Unix)

In your FORTRAN application you always refer to these files in uppercase (even in Unix). The ESO preprocessor will take care of that; see the example code in Appendix .
Also, if you write your application code in FORTRAN 77, you must include the very important common block VMR . This common block acts as an emulation of the pointer mechanism, which is well known in C. Using the array MADRID , the addresses of the input and output data arrays are passed to subsequent routines. Refer to Appendix  to see what the code looks like.

For C programs you have to include the file
MID_DISK:['MIDASHOME'.'MIDVERS'.INCL]midas_def.h (in VMS)
or
$MIDASHOME/$MIDVERS/incl/midas_def.h (in Unix)