If anyone gets this when running the ant build all, as outlined in [1], my solution was to manually download
http://sourceforge.net/adobe/flexsdk/code/HEAD/tree/trunk/frameworks/libs/OSMF2_0.swc?format=raw and copy it to C:\dev\ant_flex\flex-sdk\in -- View this message in context: http://apache-flex-development.2333347.n4.nabble.com/FlexJS-osmf-swc-could-not-be-downloaded-or-found-in-cache-tp60991.html Sent from the Apache Flex Development mailing list archive at Nabble.com.