# PETSc Error
**URL:** https://discourse.julialang.org/t/petsc-error/87081
**Category:** General Usage
**Tags:** question
**Created:** [September 11, 2022, 3:54pm UTC](https://discourse.julialang.org/t/petsc-error/87081 "2022-09-11T15:54:47Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@DEVASMIT\_DUTTA](https://discourse.julialang.org/u/DEVASMIT_DUTTA)
#### Post date: [September 11, 2022, 3:54pm UTC](https://discourse.julialang.org/t/petsc-error/87081/1 "2022-09-11T15:54:47Z")
Hi, I am operating on macOS Monterey, version 12.5.1, and i am facing an issue when i try to run code using GridapPETSc, below is the error in stack-trace
```julia
PETSc Error --- Application was linked against both OpenMPI and MPICH based MPI libraries
and will not run correctly
```
After i got this error, i have un-installed MPICH from my machine, and currently only have OPEN-MPI, but still it shows having linked with multiple MPI implementation. Any help in this regard will be very much appreciated …
---
### Author:  [@digital\_carver](https://discourse.julialang.org/u/digital_carver)
#### Post date: [September 14, 2022, 12:10pm UTC](https://discourse.julialang.org/t/petsc-error/87081/2 "2022-09-14T12:10:18Z")
I don’t know this specific library, but in general, this sounds like an issue that might be solved by:
```julia
import Pkg; Pkg.build("GridapPETSc")
```
---
### Author:  [@DEVASMIT\_DUTTA](https://discourse.julialang.org/u/DEVASMIT_DUTTA)
#### Post date: [October 6, 2022, 9:16pm UTC](https://discourse.julialang.org/t/petsc-error/87081/3 "2022-10-06T21:16:32Z")
@digital_carver thanks for the reply. However, I did the following to sort out the error:
1. keep the `MPI.toml` file empty
2. then building `MPI.jl` and `GridapPETSc.jl`, worked perfectly fine.