[unifor]

Hi All, I am trying to use the function object flowRatePatch to output the flow rate at inlet and outlet boundaries for a simpleFoam case. I followed the user guide as shown here:
http://cfd.direct/openfoam/user-guide/function-objects/

However, when I run the case, it shows the error message:
===========================================
--> FOAM FATAL IO ERROR:
keyword type is undefined in dictionary ".FoamFile"

file: .FoamFile from line 10 to line 13.

From function dictionary::lookupEntry(const word&, bool, bool) const
in file db/dictionary/dictionary.C at line 442.
============================================

Line 10 to line 13 refers to these lines in the file flowRatePatch:
============================================
version 2.0;
format ascii;
class dictionary;
object flowRatePatch;
============================================

If I delete these lines, OpenFoam would complain that I don't have type faceSource. How do I install this faceSource? I am using OF3.0.1.

Btw, how to find and install additional solvers? I want to use BiCGstabl but don't know how to install it.

Thanks for any help!