Mesh Database¶

From version 2017.5, the Mesh Database was included in MIKE OPERATIONS' GIS Manager. This allows users to work with unstructured 2D data (e.g. dfsu). Storage of this data in a MIKE OPERATIONS database is only available with PostgreSQL and requires a specific DLL to be located on the database server. Several options are possible.

PostgreSQL installed automatically with the MIKE OPERATIONS installer¶

The installer and the Database Management Utility will automatically copy this file if PostgreSQL is installed locally.

PostgreSQL installed manually (same version as MIKE OPERATIONS installer)¶

In the case PostgreSQL is not installed locally, the user will need to carry out the following steps to ensure MIKE OPERATIONS works correctly:

Locate and copy the file called DHI_mesh.dll in the MIKE OPERATIONS bin folder
Log in to the computer on which the database server is installed (PostgreSQL)
Paste the file to the lib folder of the PostgreSQL installation (e.g. C:\Program Files\PostgreSQL\17\lib)..

PostgreSQL installed manually (different version than MIKE OPERATIONS installer)¶

If a different version is installed, the user will need to get a hold of the correct version of the dll.

Open the folder containing all the DHI_mesh.dll versions

MO 2025.2 and earlier versions	MO 2025.3 and later versions
Open Database Manager Utility and connect to a PostgreSQL database server	Open the PostgreSQL in the bin folder (e.g.,`c:\Program Files (x86)\DHI\MIKE OPERATIONS\2025\bin\PostgreSQL\`)
Go to the `%temp%\DHIDSS` folder, search for "c_extension" and open the folder

Find the DHI_mesh.dll file corresponding to your database version.

Log in to the computer on which the database server is installed (PostgreSQL)
Paste the file to the lib folder of the PostgreSQL installation (e.g. C:\Program Files\PostgreSQL\17\lib).

Azure Database for PostgreSQL flexible server¶

It is currently not possible to access the lib folder for Azure Database for PostgreSQL flexible server. So the Mesh Database is not supported.