[hy1112006]

I created a volVectorField "HAG_BC " in the "0" time folder before running the case.

This HAG_BC will not be changed in the following time step, it remains the same but it should be appeared in every time step folder because the boundary condition needs to read it every time step.

How can I implement it ?

I added the the following staff in the "creatFields.H"：

volVectorField HAG_BC
(
IOobject
(
"HAG_BC",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
mesh
);

//==============

But still get the error:

--> FOAM FATAL IO ERROR:
cannot find file

file: /home/yhan/Desktop/PrecTest/1/HAG_BC at line 0.

From function regIOobject::readStream()
in file db/regIOobject/regIOobjectRead.C at line 73.

//====================================

Which means HAG_BC is not written in the "1" (next)time folder.

How can I implement it ?

Thanks