# Security Sandbox Violation, Error #2028
**URL:** https://community.wowza.com/t/security-sandbox-violation-error-2028/39267
**Category:** Wowza Streaming Engine
**Created:** [June 9, 2013, 4:18pm UTC](https://community.wowza.com/t/security-sandbox-violation-error-2028/39267 "2013-06-09T16:18:45Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Olaf\_Larsson](https://community.wowza.com/u/Olaf_Larsson)
#### Post date: [June 9, 2013, 4:18pm UTC](https://community.wowza.com/t/security-sandbox-violation-error-2028/39267/1 "2013-06-09T16:18:45Z")
I have following very simple action script 3 code
```auto
import flash.net.NetConnection;
var nc:NetConnection = new NetConnection();
nc.connect("rtmp://localhost/SOtest2");
```
…when debugging flash I get the following very annoying error:
> \*\*\* Security Sandbox Violation \*\*\*
>
> Connection to rtmp://localhost/SOtest2 halted - not permitted from file:///C|/wamp/www/SOtest2/SOtest2.swf
>
> – Untrusted local SWFs may not contact the Internet.
>
> SecurityError: Error #2028: Local-with-filesystem SWF file file:///C|/wamp/www/SOtest2/SOtest2.swf cannot access Internet URL rtmp://localhost/SOtest2.
>
> at [flash.net](http://flash.net)::NetConnection/connect()
>
> at SOtest2\_fla::MainTimeline/frame1()[SOtest2\_fla.MainTimeline::frame1:3]
>
> Cannot display source code at this location.
>
> Other projects doesn´t give me the same error when debugging. I think it possibly started to appear when i upgraded to a new version of flash (11.7.700).
>
> If I publish the project it seems to work normally and I see that I’m connecting to the Wowza server in the server log.
>
> Does anyone of you have an idea what the problem is? How could it be that some files are affected and some are not?
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [June 10, 2013, 11:04pm UTC](https://community.wowza.com/t/security-sandbox-violation-error-2028/39267/2 "2013-06-10T23:04:43Z")
[duplicate](http://community.wowza.com/t/-/39264)
---
### Author:  [@Olaf\_Larsson](https://community.wowza.com/u/Olaf_Larsson)
#### Post date: [June 16, 2013, 11:53pm UTC](https://community.wowza.com/t/security-sandbox-violation-error-2028/39267/3 "2013-06-16T23:53:24Z")
Sorry for the duplicate post. The problem was that I had set the publish settings parameter “Local playback security” to “Access localfiles only” when changed to “Access network only” the problem disappeared.