CC3200 烧录/sys/mcuimg.bin 文件时，使用CCS UniFlash 烧录时 提示ERROR: Open operation failed

uniflash的完整log请提供一下

确认一下，再烧录bin文件之前，有没有先格式化再操作？

没有先格式化，因为除了/sys/mcuimg.bin，还有其他的一些网页文件，所以我是以替换/sys/mcuimg.bin方式进行的，这个是不是存在问题呢，问题是出在哪里呢？
这是出错的日志
[16:08:27] Begin Program operation.
[16:08:28] INFO: > Executing Operation: Connect
[16:08:30] INFO: setting break signal
[16:08:31] INFO: detecting FTDI for device reset
[16:08:31] ERROR: No device USB ports were found
[16:08:31] INFO: --- please restart the device ---
[16:08:40] INFO: connection succeeded
[16:08:40] INFO: getting storage list
[16:08:40] INFO: > Executing Operation: Init
[16:08:40] INFO: reading version info
[16:08:40] INFO: DEVICE CC3200 ES1.33
[16:08:40] INFO: reading version info
[16:08:41] INFO: reading version info
[16:08:43] INFO: > Executing Operation: Program
[16:08:43] INFO: > File name: /sys/mcuimg.bin, Update: true, Erase: true
[16:08:43] INFO: > Erase File: /sys/mcuimg.bin
[16:08:43] INFO: erasing file "/sys/mcuimg.bin"
[16:08:43] INFO: deleting file "/sys/mcuimg.bin"
[16:08:43] INFO: erase file completed
[16:08:43] INFO: > Size of file = 176784
[16:08:43] INFO: > Update File: /sys/mcuimg.bin
[16:08:43] INFO: Downloading file "/sys/mcuimg.bin" with size 176784
[16:08:43] ERROR: Open operation failed
[16:08:43] INFO: > Executing Operation: Disconnect
[16:08:43] Operation Program returned.