Release Notes - MIKE OPERATIONS 2026¶
Release date¶
January 2026
Welcome¶
Welcome to MIKE OPERATIONS 2026.0
In this Release Note, you will find information about new features of MIKE OPERATIONS and what you need to know to install and get started with Release 2026.0.
MIKE OPERATIONS is a software product designed for data management and model-based forecast services for online operational control of river systems, water collection systems and water distribution systems. MIKE OPERATIONS empowers you to build real-time systems by offering flexible tools that help you deal with complexities such as acquiring and combining online data sources in preparation for real-time modelling.
MIKE OPERATIONS is a product consolidation of software tools developed and applied in projects since 2012. Hence, although MIKE OPERATIONS is a relatively new member of the MIKE product family it builds on proven software products that already serve many customers worldwide.
System requirements¶
The table below shows the fully supported operating systems. Those are systems that have been tested in accordance with MIKE's Quality Assurance procedures and where warranty and software maintenance agreement conditions apply.
| Supported Operating Systems |
|---|
| Windows 11 version 25H2 (64 bit) |
| Windows Server 2025 |
| windows server 2022 |
Note
When running a fully supported operating system as a 'guest operating system' on a virtualization platform, it is automatically downgraded to a non-supported operating system under the conditions provided above.
| Minimum hardware/software requirements | |
|---|---|
| Processor | Compatible with x64 instruction set, 2.2 GHz or higher |
| Memory (RAM) | 16 GB or higher * |
| Storage | 64 GB or higher * |
| Display | Resolution 1024 x 720 (High-Definition) or higher, 24-bit color (true color) |
| Graphics adapter | 64 MB RAM (256 MB RAM or higher recommended), 32-bit true color |
| Software requirements | Microsoft .NET Framework 4.7.2 or higher |
(*) The actual required amount of memory and disk space depend on the usage (application, model setup, size of data files etc.)
Installation and Prerequisites¶
Depending on your particular use case, several guides are available:
- Install MIKE OPERATIONS on a new Server, please follow this Installation Guide
- Install MIKE Modelling Workbench, please follow this Getting Started
- Upgrade MIKE OPERATIONS to a newer version (e.g. from version 2026.1 to 2026.2), please follow this Upgrade guide
License file and dongle¶
DHI License Management is used to configure the MIKE OPERATIONS licenses and visualise the modules available. The table below summarizes how the DHI License Mangement modules correspond to MIKE OPERATIONS Managers and User Interfaces.
| Licensed module | MIKE OPERATIONS User Interface/Manager |
|---|---|
| MO_DBase (*) | PostgreSQL and Microsoft SQL Server |
| MO_WorkbenchUI | MIKE Workbench MIKE Modelling Workbench |
| MO_Web_Operatior_View | MIKE OPERATIONS Web |
| MO_Desktop_Operatior_View | MIKE OPERATIONS (aka MIKE OPERATIONS Desktop) |
| MO_Data | Document Manager Favorite Manager GIS Manager Places Manager Report Manager Script Manager Spreadsheet Manager System Manager Time serie Manager Workflow Manager |
| MO_Planning | Analysis Manager |
| MO_RealTime | Job Manager Operations Manager |
| MO_Scenario | Scenario Manager Indicator Manager |
(*) If this module is not licensed, only a single user SQLite database is enabled.
Product invocation¶
Launch MIKE OPERATIONS 2026, MIKE Workbench 2026, MIKE Modelling Workbench 2026 or Database Management Utily 2026 from the Windows Start menu.
Support¶
For general support, please refer to our FAQ or the MIKE OPERATIONS Online Help.
If you experience any difficulties, or if you have questions, please contact our Customer Care team.
You can also contact your local Customer Care team for support in your local language.
New features¶
Every new release of MIKE OPERATIONS consists of new modules, new features and/or corrections to problems or significant inconsistencies discovered in previous releases.
| Module | Description | Reference |
|---|---|---|
| Web APIs | Linux-based container and improved Azure deployment (see below) | 121454, 121455, 122761 |
| Scenario | Simplified MIKE+ model import and scenario configuration (see below) | 122985 |
| Scenario | Coordinate System selection form applied to MODFLOW and EPANET adaptors | 122985 |
| GIS | Coordinate System selection form applied to all tools | 119729 |
| GIS | Extended Mesh export tool to support dfsu | 12350 |
| GIS | Extended MIKE Cloud upload tool to support simulations spatial outputs | 12350 |
| GIS | Extend existing ESRI geodatbase import tool to support indivisual feature class creation and update | 120032 |
| GIS | New feature class splitting tool based on point a feature class | 20393 |
| GIS | Ability to snap points to polylines in the map view during an Edit session | 120027 |
| MIKE OPERATIONS Desktop | Ability to snap points to polylines in the map view during an Edit session | 121439 |
| MIKE OPERATIONS Desktop | Improved configuation of charts for Ensemble and normal time series. Removed Chart property window for simplification. | |
| MIKE OPERATIONS Web | Improve visualisation and configuration of Ensemble time series | 120667 |
| MIKE OPERATIONS Web | Option to select Places that are not connected to any model | 120374 |
| Improved license management | More robust Job execution (See below) | 105562 |
| New Web APIs | New ways to interact with MIKE OPERATIONS system (See below) | 114873 |
| MIKE OPERATIONS Web | Improved places configuration (See below) | 110835 |
| Database usage | See below | 116689 |
| GIS Manager | New tool to import Feature classes and Tables from ESRI file geodatabases | 115488 |
| GIS Manager | New tool to create MODFLOW recharge file from MIKE SHE results | 11683 |
| GIS Manager | Feature Class ASCII import tool improvements. Support xyz files. Fixed issue when comma in comment | 113239 |
| GIS Manager | Raster Clip tool was improvemed by hiding misleading properties (Value outside and Raster band) from user interface. | 113541 |
| GIS Manager | The NetCDF implementation was refactored. Support more files types. New Import from NetCDF file for Mesh Manager. New Export tool from Raster. New Export tool from Mesh. Improve NetCDF import tools. Support NetCDF from Folder Provider (raster) | 113238 |
| Troubleshooting wizzard | New link to License log (Internet License). New rules on Event Manager. New rule for registered time series using a provider which is not configured anymore. Improve database connection error message. | 112976 |
| Python Package Manager | The package name input field now filters the table and selecting a package in the table updates the input field. | 111417 |
| Connection configuration | Connections can not be deactivate and a new description field was added | 123399 |
License Management improvements¶
The license management has been improved for Jobs. Once configured, Jobs do not check for license anymore, allowing a more robust deployment of real time systems. This stops jobs from failing when the connection to the license server is lost. A license is still required to work with Jobs in MIKE Workbench (i.e. create, edit, view, delete). When a Job runs a MIKE model, a license check will still be made for the corresponding engine.
Web APIs¶
WebAPIs are now available to access a MIKE OPERATIONS system from the web. It is possible to read / write data and run jobs. Those Web APIs can be installed locally, using IIS.
The installer is available by contacting DHI.
Read more: here
MIKE OPERATIONS Web¶
The Places Management is becoming the central place to store feature / time series connections. Those places are now used both by MO Web and MIKE Workench.
A tool was developed to convert old MIKE OPERATIONS Web setups, stored in Spreadsheet, to places.
The workflow was further simplified by developing another tool that creates places based on a feature class and a time series group.
Additionally, MIKE OPERATIONS Web has improved the workflow to configure Places using the Run automatic setup tool in the configuration tab. The configuration is now based on model objects, are showns in MIKE Workbench, and not based on underlying feature classes.
Finally, MIKE OPERATIONS Web allows users to configure Places even for systems where no model exists. It can thus be used as a simple data viewer for clients not having a license for Scenario Manager.
Database usage¶
The Database usage wizzard was improved to be able to pin-point to big datasets. A new combo-box filters Managers to show the corresponding size in the database. This includes the corresponing blob storage entries. Then an Analyse button allows the user to investigate the data in a Tree view, that matches the Manager Explorers and groups. In this new view, it is also possible to filter and identify the top 10 biggest dataset. This was implemented for Spreadsheet, Time series and Scenario Managers.
Additionally, a new "Export to csv" button now allows for further analyse the data in Excel.
MIKE+¶
This release is the fisrt step in an complete overhall of forecasting system configuration workflow.
The import of MIKE+ models, configuration of scenarios, post-processing and publishing on the Web was simplified.
- Model objects were renamed to align with MIKE+ terminolgoy (122985)
- Automatic MIKE+ model import and configuation
- including import of MIKE1D cs scripts)
- new GeoTIFF Output model object (122991)
- new flood extent model object (123063)
- Automatic configuration of scenario standard scenario:
- Set Auto-approve to True
- Set Enable initial condition to True
- Set Initial conditions to hot / latest
- Handle 2D initial condition in local Folder
- Set simulation time
- Create, add and map ensemble input time series
- Create, add and map 2D outputs
- Output time series configured using places (select closest output
- Automatic configuration of "no Data Assimilation" scenario
- Automatic configuration of Post-processing tasks
- Ability to specify a list of post-processing tools and scripts, automatically ran after the engine execution complition
- Upload to MIKE CLoud for MO Web visualition (Tilesservice)
- Create flood extent polygon
- Create GeoTIFF outputs images for web visualisation
Web APIs¶
Web APIs are now available as Linux based docker container accessible from MIKE Cloud Azure Container Registry. Additionally, a Terraform script was written to create all required resources on Azure. (Contact DHI for access).
A new end-points was created to start Azure Virtual Machine and the Job Execution one was improved to select the machine on which to run a Job (using Job Hosts configured in the database).
Fixed issues (2026.0)¶
MIKE Workbench¶
| Module/type | Error/Inconvenience fixed | Reference |
|---|---|---|
| Scenario | MIKE1D adapter does not find all input | 114677 |
| Script | MO Desktop APIs cannot be accessed | 113170 |
| Time series | Missing column crashes tool | 118538 |
| Time series | MIKE Cloud timeseries are registered with wrong unit | 115025 |
| Time series | The Select Timeseries tool return the wrong output type when used in a Sequence | 110968 |
| Time series | "Saving as" time series datatable cannot be easily stopped with cancel button when many time series are present. | 110996 |
| Time series | Timeseries export with "To File" should respect ensemble member names | 111007 |
| Job | Copy/paste of multiple nodes | 91915 |
| Job | JobTask "ManageJob" now logs the number of deleted jobs | 109395 |
| Job | Job task category name should have the "DSS" removed in the prefix | 102257 |
| Job | Change the "job fail" icon | 118122 |
| Job | The Job execution form for was changed to a workflow approach (i.e. with 'Next' buttons) to avoid users overlooking the Settings | 110683 |
| Job | Issues when unscheduling a job on a remote host that does not exist anymore. The "Unschedule" and the "Edit Schedule" windows window were improved | 103349 |
| Job | Job tasks get wrong name | 119409 |
| Job | JobProperties.xml is empty and throws errors in MIKE Workbench | 116272 |
| GIS | "Import" tools for Raster Folder provider should not be supported | 119581 |
| Scenario | MIKE1D Adapter does not set dates on initial condition | 115744 |
| Scenario | Model Registration Wizard ignores input for scenario name | 114472 |
| Scenario | MODFLOW model does not register - Invalid literal for int() | 120784 |
| Scenario | MIKE21FM model does not import | 122665 |
| Script | poor error message when getting spreadsheet | 111620 |
| Script | Data Export/Import does not preserve script type | 115740 |
| Script | Debugger fails on UnboundNameException | 117628 |
| Job | Job task RunScript does not capture exceptions | 112616 |
| Job | trigger description does not reflect configuration time | 116316 |
| Time series | "save as" is not working properly in table | 111641 |
| Time series | Import from ASCII cannot import files exported to ASCII when using From Folder | 13059 |
| Time series | Not all time series types were migrated to new TeeChart component | 119582 |
| Time series | Not all chart controls were migrated to new TeeChart component | 121436 |
| MO Desktop | Not all time series types were migrated to new TeeChart component | |
| MO Desktop | In Summary view, copying does not work and a faulty configuration results in nothing shown | 119726 |
MIKE OPERATIONS Web¶
| Module/type | Error/Inconvenience fixed | Reference |
|---|---|---|
| Scenario | Error when removing one (of multiple) time series in scenarios edit mode. | 118061 |
| Scenario | It is not possible to edit the selected time series. | 117539 |
| Scenario | Issues when editing a number in the "Table" and then exporting it as CSV. | 118839 |
| Configuration | Error in step 4 of configuration, when editing a single line or importing the whole table. | 117538 |
| Configuration | Error "Cannot use 'in' operator". | 118056 |
| Configuration | Error "Cannot read properies of undefined (reading 'datasource'" occurs when edit any place. | 118228 |
| Main | Public access to see the last scenario does not work anymore. | 118817 |
| Main | Issue when selecting quantile of ensembles time series. | 118838 |
| Core | Improve French translation. | 114290 |
| Scenario | Deleting does not work | 120844 |
| Scenario | I cannot select my input time series | 120776 |
| Scenario | Cannot edit more than 2 points in times series when configuring scenario | 120845 |
| Scenario | Simulation timeseries should be empty | 120373 |
| Main | The 2D maps does not change when selecting other simulation | 122741 |
| Main | Somes places are missing | 120372 |
| Main | Exceedance does not work | 120375 |
| Main | Cannot visualise table | 120842 |