已经先连接目标，然后Load Symbols，然后主CPU全速运行。这时候在对CLA进行单步运行时出现
CLA_0: Can't Single Step Target Program: (Error -2060 @ 0x0) Requested operation cannot be done while device is running. Halt the device, and retry the operation. (Emulation package 5.1.232.0)
请问这是为什么