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==Why is a pre 2010 version of TUFLOW not working?==
In 2010 <u>[[Softlok_Dongles | Softlok dongles]]</u> were replaced by WIBU dongles. TUFLOW versions earlier than 2010 might be searching for a Softlok licence, however it is likely you have a WIBU licence. The "DB" builds of TUFLOW were created so earlier versions of TUFLOW recognise the new WIBU licences. Please download a "DB" version from the <u>[https://tuflow.com/downloads/tuflow-classichpc-archive/ TUFLOW website]</u>.
== Do I require a TUFLOW licence to create TUFLOW inputs and view results from a TUFLOW simulation? ==
No, a TUFLOW licence is only needed to run a TUFLOW .exe file (excluding tutorial, demo and example models or small models eligible for free mode). Running a TUFLOW .exe is required to:
* Process control files (.tcf, etc), check the data inputs and to construct the model using the GIS layers and other inputs. As part of this process any ERROR, WARNING or CHECK messages are issued to help resolve input data conflicts. Check files and GIS layers representing the final model construct are also produced to quality control the model’s inputs.
* To carry out the hydraulic computations provided Step 1 above produces no ERROR messages.
No licence is needed for all other tasks, including:
* Creation and editing of all input files and GIS layers.
* Running GIS plugins such as the QGIS TUFLOW Viewer.
* Running utilities (e.g. asc_to_asc.exe).
* Reviewing check files/layers in GIS.
* Viewing results (e.g. using TUFLOW Viewer in QGIS).
All TUFLOW inputs and outputs use free open formats that are readable and editable by third party software, for example QGIS and Notepad++:
* Download Notepad++ to create and review tabular data: <u>[[NotepadPlusPlus_Tips | Notepad++ installation and tips]]</u>.
* Download QGIS: <u>[[QGIS_Tips | QGIS installation and tips]]</u>.
* Install the TUFLOW Plugin: <u>[[TUFLOW_QGIS_Plugin | TUFLOW QGIS plugin installation and tips]]</u>.
* Use TUFLOW Viewer to review XMDF results: <u>[[TUFLOW_Viewer |TUFLOW Viewer]]</u>. <br>
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