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@李东岳 感谢老师回复，我的是课题组服务器，应该是有48核心的。我用GPT教的测试并行c程序是可以成功运行的，但是openfoam每个案例都有并行问题。不知道怎么搞

案例是openfoam12下的hotRadiationHomeFvDOM，划分并行区域decomposePar没问题。但是输入并行命令mpirun -np 4 foamRun -parallel以后有以下报错。求求求求解决办法！！！！！来个好心人吧！！！

--> FOAM FATAL ERROR: 
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

    From function static bool Foam::UPstream::init(int&, char**&, bool)
    in file UPstream.C at line 108.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::error::abort()

--> FOAM FATAL ERROR: 
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

    From function static bool Foam::UPstream::init(int&, char**&, bool)
    in file UPstream.C at line 108.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#2  Foam::UPstream::init(int&, char**&, bool)

--> FOAM FATAL ERROR: 
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

    From function static bool Foam::UPstream::init(int&, char**&, bool)
    in file UPstream.C at line 108.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::error::abort() at ??:?
#3  Foam::argList::argList(int&, char**&, bool, bool, bool)

--> FOAM FATAL ERROR: 
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

    From function static bool Foam::UPstream::init(int&, char**&, bool)
    in file UPstream.C at line 108.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::error::abort() at ??:?
#4   at ??:?
#1  Foam::error::abort() at ??:?