[Adrae]

When I try to load a UDF (user-defined -> functions -> compiled -> load ), I get : error code: 126. Does anyone know what that means and how to solve this problem ?
I have a FLUENT version of 17.1
Thank you very much,
Adrae

[poya0070]

Hi
Just like You
when i try to load my UDF in Fluent 17.1 this error code has been shown(I was already load this UDF with Flunet 14.5 Without problem)

[Adrae]

Hello,
I think you don't have the right compiler,
Try downloading Visual Studio 2015.
Adrae

[dvolkind]

Hello everyone!

I would like to add, that one possible reason of error code 126 is version mismatch. I.e. if you compile your code in Fluent R18.0, it will throw an error if you try to load it in R17.2.

[1988]

Originally Posted by Adrae

When I try to load a UDF (user-defined -> functions -> compiled -> load ), I get : error code: 126. Does anyone know what that means and how to solve this problem ?
I have a FLUENT version of 17.1
Thank you very much,
Adrae

The solution is deleting the libudf file that you have from the old version and compile it again with the new version. I have visual studio 2017 and I use Fluent 17.2. I had the same error as I brought my UDF and fluent files from the older version. By just deleting the old library and compile the udf in the new version of Fluent everything is solved.

[dongshancfd]

Originally Posted by Adrae

When I try to load a UDF (user-defined -> functions -> compiled -> load ), I get : error code: 126. Does anyone know what that means and how to solve this problem ?
I have a FLUENT version of 17.1
Thank you very much,
Adrae

I have the same problem in the same computer and software environments recently. My solution is the same as 1988 and it works. You can try it.

[vasava]

I have come across this 126 error recently, especially since updating to Fluent-19. As recommended, deleting the libudf helps overcome the problem.

Now, I see the 126 error only when I read a case made in earlier fluent versions with Fluent-19. There is no issue if read Fluent-16 case with Fluent-17 or 18.

I installed VS2008 5 or 6 years back on recommendation of Ansys. Since then I have never have had any issues so bad that I have to update VS.

[Chunrong]

Originally Posted by 1988

The solution is deleting the libudf file that you have from the old version and compile it again with the new version. I have visual studio 2017 and I use Fluent 17.2. I had the same error as I brought my UDF and fluent files from the older version. By just deleting the old library and compile the udf in the new version of Fluent everything is solved.

Hi 1988,

It didn't work when I used your method. I have visual studio 2017 and Fluent 19.1 and 18.2.

For your information, here is my UDF:

#include "udf.h"

DEFINE_CG_MOTION(as,dt,vel,omega,time,dtime)
{

NV_S(vel, =, 0.0);
NV_S(omega, =, 0.0);
/*reset velocities*/


vel[0]=200.0*sin(50.0*time);
/*compute velocity formula*/

Message ("time = %f, x_velocity = %g\n", time, vel[0]);

}

many thanks,
Chunrong