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Editorial Team
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Asked: 2026-06-08T10:56:45+00:00

I’m trying to include the following class in my Flash project: import flash.display.JPEGXREncoderOptions; According

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I’m trying to include the following class in my Flash project:

import flash.display.JPEGXREncoderOptions;

According to the official documentation, this is available as of Flash Player 11.3. I’ve set up FDT to use playerglobal.swc from 11.3 (and indeed, I can see the class inside the SWC from FDT’s browser inside my project). This also compiles fine. However, I get the following runtime error when I try to run the output SWF:

Error #1014: Class flash.display::JPEGXREncoderOptions could not be found.

I’ve verified that the Flash Player I’m running the .swf with is indeed 11.3 – to be more specific, 11.3.300.265. I’m running on Windows 7 64-bit, with the debug player.

Am I missing something here? Do I need to set up something else?

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1 Answer

  1. Editorial Team

    I’m guessing you’re missing the correct -swf-version compiler flag (which you can set in the Debug Configurations and choosing the right compiler flag radio so you can edit the flags as needed)

    For example, in Flash Player 11.4 -swf-version=17, so I imagine for Flash Player 11.3 it’s something like 15 or 16.

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