之前的程序是下载到RAM中的，今天把程序下载到flash，下载失败，然后重新下载到RAM，就出现以下提示的错误了，请问大神怎么处理？仿真器应该没有坏
Error connecting to the target:
(Error -1015 @ 0x0)
Device is not responding to the request. Device may be locked, or the debug probe connection may be unreliable. Unlock the device if possible (e.g. use wait in reset mode, and power-cycle the board). If error persists, confirm configuration and/or try more reliable JTAG settings (e.g. lower TCLK).
(Emulation package 6.0.407.3)
