[Youwu]

Hi,
I'm using ANSYS fluent19R3 + vs2015, and when i try to build my UDF, i received such an error:
...\...\src\myudf.c(424) : error C2143: syntax error : missing ') 'before 'const'
...\...\src\myudf.c(424) : error C2059: syntax error : ') '
here I post my code around line 424:
begin_f_loop(f,tf)
{
f_node_loop(f,tf,n)
{
v=F_NODE(f,tf,n);/*this is line 424*/
if (NODE_POS_NEED_UPDATE(v))
{
NODE_POS_UPDATED(v);
NODE_Z(v)=NODE_Z(v)+disfn[kk];

}
kk=kk+1;
}
}
The same thing happens in ANSYS fluent 17.2
But the strangest thing is when i build and load myudf in ANSYS fluent 17.0 + VS2010 it works well. i can see the boundary motion in the animation and no error appears.
I double checked my udf and make sure it's caused by spelling problems, Can anyone help me out?Thank you.

[AlexanderZ]

Is v defined well?
actually no idea, cause the code is not full. I cant check it on my computer

best regards

[LuckyTran]

1) It is a compiler error
2) it's probably related to a missing library

Originally Posted by Youwu

But the strangest thing is when i build and load myudf in ANSYS fluent 17.0 + VS2010 it works well.

You are running Fluent v17 w/ VS2010 on the same machine or a different machine? Make sure you have the same libraries on all machines. Installing a VS3000 does not mean that you do not need to install the older libraries.

[Youwu]

Originally Posted by AlexanderZ

Is v defined well?
actually no idea, cause the code is not full. I cant check it on my computer

best regards

Thank you for your reply. Yes, all definitions are correct, like Node *v here. Actually myudf works well on the old version fluent and VS, so I thought there might be some differences between different versions that caused my problems. The full code is just too long, I will attach a file if necessary.

[Youwu]

Originally Posted by LuckyTran

1) It is a compiler error
2) it's probably related to a missing library





You are running Fluent v17 w/ VS2010 on the same machine or a different machine? Make sure you have the same libraries on all machines. Installing a VS3000 does not mean that you do not need to install the older libraries.

Thank you for your advice. Fluent17/17.2/19R3 are not in the same machine so I’m building my UDF on 3 different machines. I’ll check out my vs libraries, or maybe I should reinstall vs

[Youwu]

Hi,
Finally, my friend and I worked out a solution.
As you can see, there is an array named disfn[] in the loop. I defined this array at the beginning of the code but I didn't post it. But after debugging, we found that there was a problem with the way we defined disfn[].

I first defined the disfn[] as follows:
#define n 100
real disfn[n];
This way of declaration is correct in C, and also acceptable for fluent version 17.0. However, in fluent 19R3, this declaration will cause an error in F_NODE (I don't know why). so I have to change it into:
real disfn[100];
then error C2143 is fixed.
Although the problem has been solved. But I still don't know why the previous declaration can't be used in the new fluent. Maybe some macros are different between versions.
I hope it can help somebody else. Use "#define" carefully.