I am trying to copy the results from the coarse mesh case to the new fine mesh case so that I will have some initial solution for new simulation and that will help to save my time. But after running for 100-150 iterations I am getting the error as shown below-
973 s (0.265007541 ms per cell)
[1] #0 Foam::error::printStack(Foam::Ostream&) at ??

[1] #1 Foam::sigFpe::sigHandler(int) at ??

[1] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
[1] #3 Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??

[1] #4 Foam::symGaussSeidelSmoother::smooth(Foam::Field<double>&, Foam::Field<double> const&, unsigned char, int) const at ??

[1] #5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??

[1] #6 Foam::fvMatrix<double>::solveSegregated(Foam::dictionary const&) at ??

[1] #7 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??

[1] #8 ? at ??

[1] #9 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
[1] #10 ? at ??

[cfd-CELSIUS-M740:21174] *** Process received signal ***
[cfd-CELSIUS-M740:21174] Signal: Floating point exception (

[cfd-CELSIUS-M740:21174] Signal code: (-6)
[cfd-CELSIUS-M740:21174] Failing at address: 0x3e8000052b6
[cfd-CELSIUS-M740:21174] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x36cb0) [0x7ff1325a1cb0]
[cfd-CELSIUS-M740:21174] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37) [0x7ff1325a1c37]
[cfd-CELSIUS-M740:21174] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x36cb0) [0x7ff1325a1cb0]
[cfd-CELSIUS-M740:21174] [ 3] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so(_ZN4Foam22symGaussSeidelSmoother6smoothERKNS_4wordERNS_5FieldIdEERKNS_9lduMatrixERKS5_RKNS_10FieldFieldIS4_dEERKNS_8UPtrListIKNS_17lduInterfaceFieldEEEhi+0x2f5) [0x7ff133764d35]
[cfd-CELSIUS-M740:21174] [ 4] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam22symGaussSeidelSmoother6smoothERNS_5FieldIdEERKS2_hi+0x2d) [0x7ff13376510d]
[cfd-CELSIUS-M740:21174] [ 5] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam12smoothSolver5solveERNS_5FieldIdEERKS2_h+0x3a7) [0x7ff13375db17]
[cfd-CELSIUS-M740:21174] [ 6] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE15solveSegregatedERKNS_10dictionaryE+0x11e) [0x7ff1366c2afe]
[cfd-CELSIUS-M740:21174] [ 7] laminarBuoyantSimpleSMOKE(_ZN4Foam8fvMatrixIdE5solveERKNS_10dictionaryE+0x108) [0x5961c8]
[cfd-CELSIUS-M740:21174] [ 8] laminarBuoyantSimpleSMOKE() [0x4583bc]
[cfd-CELSIUS-M740:21174] [ 9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7ff13258cf45]
[cfd-CELSIUS-M740:21174] [10] laminarBuoyantSimpleSMOKE() [0x463e60]
[cfd-CELSIUS-M740:21174] *** End of error message ***