intro story D-Flow FM


D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 


We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.

Please follow this link to the new forum: 

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.





Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems


Message Boards

Unable to find module built in Open PLCT

Nur Hanisah Sukarji, modified 3 Years ago.

Unable to find module built in Open PLCT

Youngling Posts: 1 Join Date: 1/30/18 Recent Posts

I am trying to create a new process in Water Quality through Open PLCT. I have build the DLL on Visual Studio 2017 and Intel Parallel Studio XE 2018 and then installed it as proc_def.dat and D3Dwaq_OpenPL.dll on the GUI. However, when I try to run the scenario (with the process), the requested module (CELLQUOTA) is not found, as shown below. Did I perhaps not build/install the DLL correctly?

Any help is greatly appreciated.

runid: com-1x1x1

Parallel processing with 1 processor(s)


ERROR : requested module not in process library DLL
module : CELLQUOTA
dll handle: 0
Stopped with error code : 1
Le Vu Bao, modified 2 Years ago.

RE: Unable to find module built in Open PLCT

Youngling Posts: 12 Join Date: 1/15/18 Recent Posts

hi, I have the same problem when try to modify the WAQ standard process and override back to ...waq/default folder (ofcourse with my D3Dwaq_OpenPL.DLL too) But this error still happen. Have you fix this problem?