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Hello, I'm attempting to run a linked Flood Modeller-TUFLOW model, which fails immediately with the following message in the .tlf initialising M2D licence... TUFLOW M2D Module No free LAN licences available. NoXY: ERROR 2100 - Multiple 2D Domains module not available or all licences in use. Cannot use "Start 2D Domain" command. For licensing information, please contact sales@tuflow.com. Wiki Link: http://wiki.tuflow.com/index.php?title=TUFLOW_Message_2100 We do have networked M2D licenses, and it is correct that at the time none were available. However, the set-up of the TUFLOW_Dongle_Settings.dcf file (below) should mean that TUFLOW retries for a license WIBU Retry Time == 20 ! seconds. Values less than 3 are set to 3. Default = 60. WIBU Retry Count == -1 ! Use -1 for indefinitely. WIBU Dongles Only == ON ! If ON, searches for WIBU dongles only. Default is OFF. Would anyone be able to advise on why the model fails, rather than retrying for a license? This seems to have only become an issue since updating to the latest versions of Flood Modeller (4.3) and TUFLOW (2017-09-AC-iSP-w64). Many thanks I-Hsien