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need help to resolve these errors

Other Parts Discussed in Thread: CONTROLSUITE

when I imported a program example for pwm generation from CCSv4 encountered following errors. Please help me to find the meaning of these errors 

errors are:

Description Resource Path Location Type
unresolved symbol _InitSysCtrl, first referenced in ./DSP2833x_SysCtrl.obj Lab7 C/C++ Problem


symbol "_Setup_ePWM1A" redefined: first defined in Lab7 C/C++ Problem
errors encountered during linking; "Lab7.out" not built Lab7 C/C++ Problem

unresolved symbols remain Lab7 C/C++ Problem
symbol "_Gpio_select" redefined: first defined in Lab7 C/C++ Problem

symbol "_cpu_timer0_isr" redefined: first defined in Lab7 C/C++ Problem
This project was created using a version of compiler that is not currently installed: 5.2.3 [C2000]. Another version of the compiler will be used during build: 15.12.0. Please go to <a href="liveaction:OpenAppCenter">CCS App Center</a> to install the compiler of the required version, or migrate the project to one of the available compiler versions by adjusting project properties. Lab7 properties Problems
symbol "_main" redefined: first defined in "./DSP2833x_SysCtrl.obj"; Lab7 C/C++ Problem

 

waiting for reply.

With Regards 

Aditya.