CFD Online Discussion Forums - Unable to open file when loading UDF

Hi everyone, I'm trying to simulate 2D hybrid rocket combustion using an UDF for the inlet mass flow rate at the solid fuel boundary. When I compile the UDF (using the method involving the Visual Studio command prompt) everything works fine and fluent returns this:

Code:

Copied C:\Users\alera\OneDrive\Desktop\UDF/udf_rr_HTPB_gradFL.c to libudf\src

Creating user_nt.udf file for 2ddp_host ...

(system "copy "C:\PROGRA~1\ANSYSI~1\v192\fluent"\fluent19.2.0\src\udf\makefile_nt.udf "libudf\win64\2ddp_host\makefile" ")

        1 file copied.

(chdir "libudf")(chdir "win64\2ddp_host")# Generating ud_io1.h

udf_rr_HTPB_gradFL.c

# Generating udf_names.c because of makefile udf_rr_HTPB_gradFL.obj

udf_names.c

# Linking libudf.dll because of makefile user_nt.udf udf_names.obj udf_rr_HTPB_gradFL.obj

Microsoft (R) Incremental Linker Version 14.29.30038.1

Copyright (C) Microsoft Corporation.  All rights reserved.



   Creation of library libudf.lib and object libudf.exp

Creating user_nt.udf file for 2ddp_node ...

(system "copy "C:\PROGRA~1\ANSYSI~1\v192\fluent"\fluent19.2.0\src\udf\makefile_nt.udf "libudf\win64\2ddp_node\makefile" ")

        1 file copied.

(chdir "libudf")(chdir "win64\2ddp_node")# Generating ud_io1.h

udf_rr_HTPB_gradFL.c

# Generating udf_names.c because of makefile udf_rr_HTPB_gradFL.obj

udf_names.c

# Linking libudf.dll because of makefile user_nt.udf udf_names.obj udf_rr_HTPB_gradFL.obj

Microsoft (R) Incremental Linker Version 14.29.30038.1

Copyright (C) Microsoft Corporation.  All rights reserved.



   Creation of library libudf.lib and object libudf.exp



Done.

Then when I press load fluent prints this thing below and "crashes" (it doesn't close but basically becomes unusable and weird, commands are no more executed for example, I can't retry loading and the only way is to close the application):

Code:

Opening library "C:\Users\alera\OneDrive\Desktop\UDF\libudf"...

Library "C:\Users\alera\OneDrive\Desktop\UDF\libudf\win64\2ddp_host\libudf.dll" opened



Unable to open file



 The fl process could not be started.

MPI Application rank 0 exited before MPI_Finalize() with status -1073740791

I've already tried starting fluent in parallel and serial mode, in single and double precision, and basically searched through all internet but found nothing. Can someone please help me? I'm going crazy with this error.

P.S. my Ansys version is 19.2 and my OS is windows 11

Thank you in advance