First of all, I'm sorry that sending the reply with different email address.
There is some issue at my university mail system so I send the mail with gmail.
Thanks for your support, Mark Rivers and Eric Norum. However, I faced some other issue with usbtmc.
After I saw the Eric's fixed code. I change the drcAsynUSBTMC.c file like Eric but I saw the new message like below
The version of asyn and base is 4-26, 3.14.12.5 which is same with past.
I try to use the latest version of asyn but some error occured. I think there is some compatibility issue in my environment so I used the 4-26 version.
But when I check the drcAsynUSBTMC.c file of asyn-4.26 and latest version, there was no difference so I think it is not a problem.
- Centos 7 environment (libusb_ver=0.1.4)
- Rasberrypi3 environment (libusb_ver=1.0)
In different environment, the epics shows the same message.
To check the usb cable and the dg812 equipment, I communicate with dg812 by using Ultra Sigma(Program of RIGOL) and Ni-Max test panel but there were no error.
Best Regards
SeokHoMoon