Building the library using any release configuration ens with the following compile errors: D:\Projects\RogueWave\work\apache\src\..\include\ansi\cwchar(311) : error C2732: linkage specification contradicts earlier specification for 'swprintf' D:\Projects\RogueWave\work\apache\src\..\include\ansi\cwchar(311) : see declaration of 'swprintf' D:\Projects\RogueWave\work\apache\src\..\include\ansi\cwchar(371) : error C2732: linkage specification contradicts earlier specification for 'vswprintf' D:\Projects\RogueWave\work\apache\src\..\include\ansi\cwchar(371) : see declaration of 'vswprintf' At the same time debug configurations (11d, 11s, 15d, 15s) build without errors. Thanks, Anton Pevtsov