Hello Lourdes,It sounds as though the problem may come from there being two different subroutines that produce steam properties. The one in standard TRNSYS is called "steam" while the one in the STEC library is called steam3 if I am not mistaken. In your first example:
CALL STEAM('SI',PROP,35,IERR,*84)
CALL LINKCK('TYPE219','STEAM ',1,99)
84 CONTINUE
I think you are calling the standard STEAM routine while in your second example:
CALL STEAM3('SI',PROP,35,ierr,*84)
CALL LINKCK('TYPE219','Steam3',1,99)
84 CONTINUE
you are calling the STEC library subroutine. From your description it sounds like your conditions may be outside the boundaries of the steam property algorithms in both subroutines. The only way to find out, unfortunately, is to step through the code of your call into each of the STEAM subroutines and to determine where they are going wrong. I might also mention that a lot of improvements were made to the standard STEAM routine for the release of TRNSYS 16.
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