# PetscReturnErrorHandler

Error handler that causes a return to the current level.

### Synopsis

    #include "petsc.h"
    PetscErrorCode  PetscReturnErrorHandler(int line,const char *fun,const char* file,const char *dir,PetscErrorCode n,int p,const char *mess,void *ctx)

Not Collective

### Input Parameters

| line | - the line number of the error (indicated by __LINE__)
| func | - the function where error is detected (indicated by __FUNCT__)
| file | - the file in which the error was detected (indicated by __FILE__)
| dir | - the directory of the file (indicated by __SDIR__)
| mess | - an error text string, usually just printed to the screen
| n | - the generic error number
| p | - specific error number
| ctx | - error handler context

### Notes

Most users need not directly employ this routine and the other error handlers, but can instead use the simplified interface SETERRQ, which has the calling sequence

        SETERRQ(number,p,mess)

### Notes for experienced users

This routine is good for catching errors such as zero pivots in preconditioners or breakdown of iterative methods. It is not appropriate for memory violations and similar errors.

Use PetscPushErrorHandler() to set the desired error handler. The currently available PETSc error handlers include PetscTraceBackErrorHandler(), PetscAttachDebuggerErrorHandler(), PetscAbortErrorHandler(), and PetscAbortErrorHandler()

### See Also

PetscPushErrorHandler(), PetscPopErrorHandler().

Level:developer
Location:src/sys/error/err.c
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