[NotDrJeff]

Hello,

First time poster and new OpenFOAM user here. I am trying to run a tutorial from the OpenFOAM User guide 'Turbulent plane channel flow with smooth walls' as found here.

I am getting an error when I try to run blockMesh on the files.

Unknown functionEntry 'eval' in "...system/controlDict" near line 49

Valid functionEntries are :

6 (
codeStream
include
neg
calc
includeIfPresent
includeEtc
)

This refers to a line in the control dictionary:

timestart     #eval #{ 0.1 * ${/endTime} #};

I am confused why #eval is not working, and also about the difference between #calc and #eval.

I saw something that said #eval was a new feature intended to replace #calc because it was more efficient. Is this correct? I have OpenFoam8 installed so it's not because of an old version.

I tried to replace #eval with #calc in the control dictionary but I am also confused by the apparently different syntaxes used in each case. The examples I have seen seem to suggest that #calc uses quotation marks around the expression whereas #eval uses curly braces. Have I got this correct?

I tried the following:

timeStart     #calc "0.1*${/endTime}";

but this didn't work either. I think I'm using the wrong syntax. I get the following:

error: '$' was not declared in this scope

and

error: expected ')' before '{' token

I'm sure there is an answer to this somewhere on the internet, but I'm struggling to find what I'm looking for. Any help would be appreciated!

Thanks,

P.S. I am using the windows subsystem for Linux to run Ubuntu.