---
name: "clearbddsystemrefext"
section: "3"
platform: "linux"
package: "alliance"
version: "5.1.1-3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/clearbddsystemrefext"
---

# clearbddsystemrefext(3)

clears the external references for all bdd nodes.

## NAME

clearbddsystemrefext - clears the external references for all **bdd** nodes.

## SYNOPSYS

```
#include "bdd101.h"
void clearbddsystemrefext( BddSystem )
  bddsystem ΒddSystem;
```

## PARAMETERS

- *BddSystem*

  The **bdd** system.

## DESCRIPTION

**clearbddsystemrefext** clears the external references of all the **bdd** nodes in the **bdd** system *BddSystem*. If a null pointer is given, the default **bdd** system is used.\

## RETURN VALUE

**clearbddsystemrefext** returns nothing.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   ...
   clearbddsystemrefext( (bddsystem ∗)0 );
   ...
   destroybddsystem( (bddsystem ∗)0 );
```

## SEE ALSO

[**bdd**(1)](/bdd/1.md), **[clearbddsystemref(3)](/clearbddsystemref/3.md),** **[clearbddsystemrefint(3)](/clearbddsystemrefint/3.md).**