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copied!<p>We successful implemented a hack to circumvent this limitation, in a pure AIR way, without having to change the publisher id (which needs multiple certificates, I think).</p> <p>As you know, AIR is implementing its Mutex by using a unique application identifier. This identifier is calculated using the application id, and the publisher identifier (extracted from the certificate that signed the application).</p> <p>In the installation directory of an AIR application, there is a META-INF folder (or in /share/ using Linux). This META-INF folder contains an AIR folder, which contains an "application.xml" file. This file contains a <code><id /></code> tag that defines the application identifier, which is used in the calculation of the mutex identifier. If your application can write in the installation folder, you can use the <code>File</code> API to edit it at runtime, randomly changing the <code><id /></code> tag, allowing multiple processes of the same application to be run at the same time.</p> <p>This is having some annoying side effects, like creating a new folder in the <code>File.applicationStorageDirectory</code> folder every time. But using a <code>LocalConnection</code>, you can minimize this by reusing the same identifier multiple times by logging which ones are free to be reused. Also, <code>SharedObject</code> are stored in this folder, so cannot be used (or have to be copied every time a new instance is created, and synchronized though <code>LocalConnection</code>).</p> <p>As far as I know, Adobe isn't planning to remove this native limitation. It was implemented for multi-platforming purposes, specifically on MacOS, where the dock is making that more complicated (it's not very easy to start the same application twice with the dock).</p> <p>The official way to do that is to catch the <code>InvokeEvent.INVOKE</code> event, and do stuff like opening a new window. And there's no change planned for AIR 2.0 in this behaviour.</p>

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