hello, every one! I am trying using ufile in the output part, but when I launch the calculation, there are always errors like these: PNP: **WARNING** The "parm.inc" include file is not required in the "ufile/posdat.f" user coding file. PNP: **WARNING** The "parm.inc" include file is not required in the "ufile/uasi.f" user coding file. PNP: ***ERROR*** Compilation error in user file "ufile/posdat.f". PNP: ==> Please check the compilation error messages. Is it that because I did not install fortran compiler on my pc or of other reasons? please help me. I run star in windows system, but when I use the same ufile in unix system it is allright. Can anyone give me some advice? thanks in advance!

Probably you have the statement "include 'parm.inc'" in your subroutine. From v3.2 onwards, you do not need this and the compilation will fail. I don't know why it would work on unix but not windows, unless you are using v3.15 on unix and v3.2x on windows.

Thanks Richard for your response. I am using STAR_CD 3.22 on windows. Another question, do I have to install fortran compiler on my PC? I think the STAR itself has the complier. When using FLUENT, I do not have to install C compiler at all, and the udf still works well.

No, you need a fortran compiler if you want to use user subroutines. Check which one you need - only certain ones are OK.

The Absoft fortran compiler is needed only if you are using subroutines, so in this case you need it.

is compaq visual fortran 6 suitable for star-cd 3.15?