---
name: "PAPI_perror"
section: "3"
platform: "linux"
package: "libpapi-dev"
version: "7.1.0-5+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/PAPI_perror"
---

# PAPI\_perror(3)

Produces a string on standard error, describing the last library error.

## NAME

PAPI\_perror - Produces a string on standard error, describing the last library error.

## SYNOPSIS

## Detailed Description

**C Interface:**

\#include \<**papi.h**\> \
\
  void **PAPI\_perror( const char \*s )**;

**Parameters**

*s* -- Optional message to print before the string describing the last error message.

The routine **PAPI\_perror()** produces a message on the standard error output, describing the last error encountered during a call to PAPI. If s is not NULL, s is printed, followed by a colon and a space. Then the error message and a new-line are printed.

**Example:**

```
int ret;
int EventSet = PAPI_NULL;
int native = 0x0;
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK)
{
   fprintf(stderr, \"PAPI error %d: %s\\n\", ret, PAPI_strerror(retval));
   exit(1);
}
// Add Total Instructions Executed to our EventSet
ret = PAPI_add_event(EventSet, PAPI_TOT_INS);
if (ret != PAPI_OK)
{
   PAPI_perror( "PAPI_add_event" );
   exit(1);
}
// Start counting
ret = PAPI_start(EventSet);
if (ret != PAPI_OK) handle_error(ret);
```

**See also**

**PAPI\_strerror**

## Author

Generated automatically by Doxygen for PAPI from the source code.