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Created attachment 142754 [details] error JPA 2.1 / Java EE 7 application, Java 7 update 45, Windows 7 64 bit. JPA generated JPA metadata codes can not recognized by NetBeans, but mvn command can compile successfully.
The source code is hosted on my github.com https://github.com/hantsy/ee7-sandbox
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss