SDK调试程序时报错

请问：SDK调试程序时报错，错误LOG如下，昨天调试时正常，今天重写时下载后报错，是哪里的问题，谢谢！
System reset is completed.
15:37:21 INFO : FPGA configured successfully with bitstream "F:/XilinxProject/TEST/MIZ702_SYS_6/MIZ702_SYS.sdk/system_wrapper_hw_platform_0/system_wrapper.bit"
15:38:22 INFO : Time out for XMD transaction is 60000
If you want to increase the timeout value, goto Windows-> Preferences -> Xilinx SDK -> XMD Startup
15:38:22 ERROR : Timeout occured while waiting to get reply for command "ps7_init"
15:38:22 ERROR : Unexpected error while launching program.
java.lang.RuntimeException: Error while running ps7_init method.
at com.xilinx.sdk.targetmanager.internal.TM.run_ps7_init(TM.java:1089)
at com.xilinx.sdk.debug.core.XilinxAppLaunchConfigurationDelegate.runTargetSetup(XilinxAppLaunchConfigurationDelegate.java:514)
at com.xilinx.sdk.debug.core.XilinxAppLaunchConfigurationDelegate.debugApplication(XilinxAppLaunchConfigurationDelegate.java:701)
at com.xilinx.sdk.debug.core.XilinxAppLaunchConfigurationDelegate.launch(XilinxAppLaunchConfigurationDelegate.java:311)
at com.xilinx.sdk.debug.ui.XilinxAppLaunchDelegateWrapper.launch(XilinxAppLaunchDelegateWrapper.java:31)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:858)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1018)
15:39:22 INFO : Time out for XMD transaction is 60000
If you want to increase the timeout value, goto Windows-> Preferences -> Xilinx SDK -> XMD Startup
15:39:22 ERROR : Timeout occured while waiting to get reply for command "xdisconnect 64"
15:39:22 ERROR : Disconnect target failed.

只是在继续跟进教程例程时把启动模式改了，恢复成从SD卡启动就正常了。
SD卡启动拨码码位。


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新手，总是折腾很久。。。出现问题的原因总是由于一个小小的疏忽。。