Hi everyone,

I am using an UDF for creating a user-defined viscosity. It all worked fine till today. Due to hard-disc space I moved my working-folder to another partition. If I want to load the .cas file now, I always get the error: Openening library "libudf"... Primitive Error at Node 1: open_udf_library: No such file or directory

But the directory libudf was copied, too.

The strangest thing is now, when I now try to create the .cas-file from the .msh-file again, it's not possible to load the udf. Compiling the udf works, but when i try to load it I get the same error as before.

Does anyone have an idea how to fix this problem?

I am working on Linux with FLUENT 6.3

with kind regards Dennis

You could try the following method:

Define->User Define->Function->Mange

Select original udf files and select remove

and then copy the .cas and yourudf.c to new location

compile again.

Tahnks for your response. Well the problem is I used "cut/copy" method to move the files to the other partition. So I don't have a Backup with the working file. And if I try to open the .cas-file in the new directory the open_udf_library error accurs and FLUENT freezes so that I can't remove the udf file

Greetings Dennis

Maybe you could use "cut/copy" to move the files back to orinigial location.

I moved the files back to their original location, but even there the same error occurs.

What about resetting where using udf files?

Maybe I'm a little confused about your problem

Well I am confused, too.

What do you mean with "resetting"?

I tried to build up the file again from the existing .msh-file. When I compile the UDF, I don't get an error. But when I try to load the UDF I get the "open_udf_library" error. So at the moment it is not possible to load the UDF to file in the new directory. So I don't understand why FLUENT has such a problem with this new directory

firstly you should sure that the .cas file and your udf file are in the same folder

Secondly maybe you should set the enviornment variables

OK, I reassigned the working-directory from FLUENT and now its running.