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How to update error messages
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1. Copy common/tool/error_msg_template.xml to common/error_messages/{your_package_name}.xml.
2. Modify "package uri" in the xml file, which means git path of your package.
3. Add you error enumerators into the xml file. 
   If your enumerator has same value as enumerator in tizen_error_e, then you don't have to add that error enumerator. (Ex. APP_ERROR_NONE, APP_ERROR_INVALID_PARAMETER)
    - error name : The name of error enumerator
    - value : The value of error enumerator. This value MUST be represented by error macro in tizen.h
        ex) TIZEN_ERROR_APPLICATION | 0x01 (O)
            CAMERA_ERROR_CLASS | 0x02 (X) => CAMERA_ERROR_CLASS is defined in camera.h. This MUST be "TIZEN_ERROR_CAMERA | 0x02".
    - msg : The message of error enumerator
4. If you pushed changes into gerrit, then please add the following people as reviewer.
  - Sunggyu Choi (sunggyu.choi@samsung.com)
  - Minseok Jang (m.s.jang@samsung.com)
  - ByungWoo Lee (bw1212.lee@samsung.com)



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How to submit this package with updated error messages
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1. Run python common/tool/update_msg_header.sh
2. common/include/private/tizen_error_private.h will be modified, so check "err_list" in that file.
3. Submit this package by "gbs submit".