在keil调试程序,链接时提示这样的错误,这是什么错误?

Build target 'Target 1'
linking...
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL: RELOADL
MODULE: play_Music.obj (PLAY_MUSIC)
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL: RELOADH
MODULE: play_Music.obj (PLAY_MUSIC)
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL: MUSICTAB
MODULE: play_Music.obj (PLAY_MUSIC)
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?CO?MAIN
Program Size: data=18.0 xdata=0 code=729
Target not created

RELOADL,RELOADH,MUSICTAB这几个变量重复定义了,整个程序中,全局变量只能定义一次。
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