This problem has been bothering me for several days. Last month, I got a flex 4 Project source file, when loaded to your new project, the question "cannot set zh_cn resolution resource bundle viewerstrings for the region" is displayed. After careful analysis, the problem lies in-locale.
Note: viewerstrings is A. properties file of mine, which is in the zh_cn folder of locale.
Solution: Open the project property and find "Additional compiler Parameters" in the flex compiler. The default value is-locale zh_cn (if the English version is-locale en_us );
The viewerstrings. properties file does not specify the resource path, so an error occurs,
In "Additional compiler Parameters", replace it with-locale zh_cn-source-Path = locale/{locale}-keep-all-type-selectors = true;
Note:-source-path specifies the resource path.
Start compilation to solve the problem.