使用tek-visa同时控制多台设备

[碎碎念]

代码如下:



ViSession rm;

ViSession vi1;

ViSession vi2;

ViUInt32 retCnt;

int status = 0;

int ret = 0;

status = viOpenDefaultRM(&rm);

status = viOpen(rm, (ViBuf)"TCPIP::192.168.21.222::INSTR",

VI_NULL, VI_NULL,&vi1);

status = viOpen(rm, (ViBuf)"TCPIP::192.168.21.223::INSTR",

VI_NULL, VI_NULL,&vi2);

status = viWrite(vi1, (ViBuf)"*IDN?", 5, &retCnt);

status = viRead(vi1, (ViBuf) buffer, sizeof(buffer), &retCnt);



status = viWrite(vi2, (ViBuf)"*IDN?", 5, &retCnt);

status = viRead(vi2, (ViBuf) buffer, sizeof(buffer), &retCnt);


viOpen(...vu1)是成功的，但是viOpen(...vi2)也是成功的，但是vi2 open成功以后，对vi1的读写却都是失败的，对vi2 的读写是可以的，也就是说vi2 open成功以后，原因的vi1的链接就会无效，
我这边要同时控制2台tek示波器，有谁知道应该怎么解决吗？