Then in your build step, suppress patch checks:
A: The Flex 4.x SDK includes a "Flex 3 compatibility layer" (mx.core.FlexVersion). The installer checks for this patch by default. patch listing error flex 3
# Verify your Java version java -version export JAVA_HOME= /usr/libexec/java_home -v 1.8 java -jar flex_sdk_installer-4.0.jar Then in your build step, suppress patch checks:
Use Java 8 (1.8.0_202) or older.
export FLEX_PATCH_LIST=ignore && ant main A: Yes. The Apache Flex JIRA issue FLEX-35500 has a community-built shell script that automatically remaps all dead patch URLs to the Apache archive. Conclusion The "Patch Listing Error Flex 3" is a symptom of aging infrastructure, not broken code. By understanding that the error stems from dead Adobe URLs, SSL mismatches, or corrupted caches, you can apply the precise fix—clearing the cache, forcing TLS 1.2, or manually injecting the patch. export FLEX_PATCH_LIST=ignore && ant main A: Yes