udf编译后下拉里没有函数

once

我是udf初学者，想做个动态网格，就用了udf教程里DEFINE_CG_MOTION的例子
然后貌似编译是成功的
Deleted old libudf\ntx86\3d\libudf.dll
已复制         1 个文件。
(system "copy D:\Fluent\fluent6.3.26\src\makefile_nt.udf libudf\ntx86\3d\makefile")
已复制         1 个文件。
(chdir "libudf")()
(chdir "ntx86\3d")()
try00.c
# Generating udf_names.c because of makefile try00.obj
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj try00.obj
Microsoft (R) Incremental Linker Version 6.00.8168
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.

   Creating library libudf.lib and object libudf.exp

Done.
"e:/path"

Opening library "libudf"...
Library "libudf\ntx86\3d\libudf.dll" opened
        piston
Done.

按理说dynamic mesh zones的mesh motion udf下拉里应该就有piston函数，但是没有，user-defined function hooks里也是空的，请问怎么回事