hello sir

Help me in resolving this issue

```
meshio mesh object>
Number of points: 44182
Number of cells:
triangle: 5028
triangle: 3710
triangle: 608
triangle: 3716
triangle: 608
triangle: 2974
triangle: 2974
triangle: 2974
triangle: 2974
triangle: 5024
tetra: 227276
Cell sets: gmsh:bounding_entities
Point data: gmsh:dim_tags
Cell data: gmsh:physical, gmsh:geometrical
Calling FFC just-in-time (JIT) compiler, this may take some time.
WARNING: The number of integration points for each cell will be: 125
Consider using the option 'quadrature_degree' to reduce the number of points
Calling FFC just-in-time (JIT) compiler, this may take some time.
WARNING: The number of integration points for each cell will be: 125
Consider using the option 'quadrature_degree' to reduce the number of points
UMFPACK V5.7.9 (Oct 20, 2019): ERROR: out of memory
Traceback (most recent call last):
File "/home/ayush/flow.py", line 76, in <module>
solve(F == 0, up, bc, solver_parameters={"newton_solver":{"linear_solver":'mumps'},"newton_solver":{"relative_tolerance":1e-7}})
File "/usr/lib/petsc/lib/python3/dist-packages/dolfin/fem/solving.py", line 233, in solve
_solve_varproblem(*args, **kwargs)
File "/usr/lib/petsc/lib/python3/dist-packages/dolfin/fem/solving.py", line 314, in _solve_varproblem
solver.solve()
RuntimeError:
*** -------------------------------------------------------------------------
*** DOLFIN encountered an error. If you are not able to resolve this issue
*** using the information listed below, you can ask for help at
***
*** fenics-support@googlegroups.com
***
*** Remember to include the error message listed below and, if possible,
*** include a *minimal* running example to reproduce the error.
***
*** -------------------------------------------------------------------------
*** Error: Unable to successfully call PETSc function 'KSPSolve'.
*** Reason: PETSc error code is: 76 (Error in external library).
*** Where: This error was encountered inside ./dolfin/la/PETScKrylovSolver.cpp.
*** Process: 0
***
*** DOLFIN version: 2019.2.0.dev0
*** Git changeset: ubuntu
*** -------------------------------------------------------------------------
```