[imani]

hi formers
who know what is this error?


--> FOAM FATAL ERROR:
updateCoeffs(const scalarField& snGradp) MUST be called before updateCoeffs() or evaluate() to set the boundary gradient.

From function fixedFluxPressureFvPatchScalarField::updateCoeffs( )
in file fields/fvPatchFields/derived/fixedFluxPressure/fixedFluxPressureFvPatchScalarField.C at line 151.

FOAM exiting

[wyldckat]

Greetings imani,

Originally Posted by imani

who know what is this error?

I probably have already seen this error before, but from only the very brief information you've given, I cannot remember what was the problem that I saw back then... possibly over 1 year ago.

Please provide more detailed information, as explained here: http://www.cfd-online.com/Forums/ope...-get-help.html

Best regards,
Bruno

[imani]

hi
i want ti run a case with openFoam 230
in p_rgh i use fixedFluxPressure boundary condition
but i have that error
in of211 we should use buoyantPresssure
but in of230 we should use FixedFluxPressure
but in my program it is wrong

[wyldckat]

Unfortunately that is still not enough information.

Since you did not provide enough information, I'm only able to suggest that you compare the same tutorial case from each OpenFOAM version, to try and see if there are any more details that need to be changed.
For example, you could use the following command for comparing the two folders:

diff -Nur case_211 case_230 > differences.txt

This will compare all files within the folder "case_211" versus the folder "case_230" and will place the differences inside the file "differences.txt".