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Different Model Results When Writing to External Harddrive Compared to Writing to Internal Harddrive

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I am experiencing an issue where TUFLOW is producing different results when running the same model from (and writing output to):

a) an external harddrive

B) the internal hardrive (C drive)

I performed a test running the exact same model from each the external harddrive and the C drive. The simulation carried out on the external harddrive ran through as normal where some flow broke out of the main channel.

The simulation carried out on the C drive seems to go unstable at 1 hr 5 mins into the run when flow in the main channel stops flowing. Additionally the DV in the TLF drops rapidly at this point. The run does not officially go unstable and runs through the entire simulation time.

I am unsure as to why this is occurring. I have heard of runs being run twice producing the different results, however in this case simulations that have been run from the external hardrive (and for that matter the C drive, even though flow stops flowing in the channel) are producing the same results when run twice.

Any thoughts?

Thanks

Edward

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That's interesting. Are the simulations completed for the same duration? Are there any results writing warning messages in tlf? Possible to upload your model to a network storage for others test?

Cheers,

Eric

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Hi Edward,

 

Very strange behaviour indeed!  I assume the two models were run on the same PC?  Assuming it was run on the same PC, using the same version of TUFLOW and for the same duration etc, I've never come across this behaviour before.  Would you mind posting the tlf files from the two runs so we can have a look?

 

Thanks Edward.

 

Cheers,

Mick

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Hi Edward,

 

When running are the model inputs in the same location or in different locations?  It is very easy to accidentally change an input on one location and not mirror this on the other.  To test if there is a difference when writing the results locally or to an external drive are you able to use the following command in the .tcf:

Output Drive == <external drive letter>

 

For example "Output Drive == F" will write all outputs (checks, results and log files) to the external drive F:\.  This should avoid any confusion between different inputs and different output locations.  This is the only thing that i can think of that could be causing differences!

 

Cheers

Phil

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