# MPI library
**MPI**, short for Message Passing Interface, is a library that allows you to write parallel programs in Fortran77 or C. The library uses common operating system services to exchange information among the parallel processes it creates. 

# MPI_Comm_call_errhandler

This method calls the error handler installed on a communicator. 
# Syntax

```C
int MPI_Comm_call_errhandler(
  MPI_Comm comm,
  int errorcode
);
```
# Parameters
* **`comm`** is a communicator object describing a group of processes. In many applications, various processes work together, and a communicator describes the processes that a routine initiates.

* **`errorcode`** is the error code supplied to the communicator's error handler.



# Return value

If unsuccessful, the function returns an error. The error, by default, aborts the MPI job.

* In case of success, it returns **`MPI_SUCCESS`**, which is the value returned upon successful termination of any MPI routine.
* In case of an invalid communicator provided in the function's argument, **`MPI_ERR_COM`** is returned.





What is MPI_Comm_call_errhandler?

MPI_Comm_call_errhandler calls the error handler on a communicator group in MPI. If successful, it returns MPI_SUCCESS.