Patch Listing Error Flex - 3

If you encounter the "Patch listing error flex 3" in an automated build environment, you cannot use an interactive installer. Use the official Docker image for Apache Flex:

FROM apache/flex:4.16.1
For developers who maintain legacy Flex 3 patch systems, the error can be resolved by modifying the PatcherService.as or the server-side PatchListingServlet.java. patch listing error flex 3
The Apache Flex SDK installer caches patch listings from https://archive.apache.org/dist/flex/. If your local cache is corrupted, the installer cannot parse the patch index. If you encounter the "Patch listing error flex
We will proceed from the simplest, least intrusive fix to the most advanced manual patch. Manual procedure:
If the automated installer continues to show "Patch listing error flex 3", bypass it entirely. Here is how to manually apply the Flex 3 patch set.
What you need:

Manual procedure: