Connections issues with device

[sebaleme]

Hi,
I would like to report 3 problems that I have when using the RsInstrument package.

1. VI_ERROR_RSRC_BUSY when trying to contact device
2. Device is not replying after some time
3. HisLip connection not working

=============================
Problem 1:
The python interface throws the following error quite often when I try to access the device. Feeling is that this is a transient error: VI_ERROR_RSRC_BUSY
I have implemented a workaround, which is looping until the device accept the connection, but maybe there is a nicer way to do it?

My config:

• OS: "Ubuntu 20.04.6 LTS"
• rsvisa/now 5.12.9 amd64
• RsInstrument: 1.82.1

I am accessing a HMC 8041 power supply

My code looks like this:

if __name__ == "__main__":
    args = parse_args()
    instr = None
    # Try at least several times before giving up.
    value = 0
    error_msg = str()
    while value<MAX_RETRY:
        try:
            instr = RsInstrument(RESSOURCE_IP, id_query=True, reset=is_reset_needed(args.command))
            #idn = instr.query("*IDN?")
            break
        except Exception as e:  # pylint: disable=W0703
            error_msg = str(e)
            print("attempt failed, will retry...")
            time.sleep(3)
            value = value + 1
            pass
    if(value <MAX_RETRY):
        options[args.command](instr)
        instr.close()
    else:
        print("operation failed: ",error_msg)
    exit(0)

Here are the kind of error I am getting:
Error message: VI_ERROR_RSRC_BUSY (-1073807246): The resource is valid, but VISA cannot currently access it.
or
Error message: 'TCPIP::192.168.2.200::INSTR': Instrument error detected: -410,"Query INTERRUPTED"

Like I said, this code works, I am getting the connection, but only after several attempts, which is annoying. As workaround, I only use "*_with_opc" commands, but it did not bring anything.

======================================
Problem 2:

Another error, which is more serious, is that after a certain time, the power supply stop accepting connections and I always get the following exception:

operation failed:  Insufficient location information or the requested device or resource is not present in the system.
Library: Visa Library at /usr/lib/librsvisa.so
Manufacturer: Rohde & Schwarz GmbH
Resource Name: 'TCPIP::192.168.2.200::INSTR'

There is only one solution, restart the power supply manually. And some time, it can be every 20min, depends.

======================================
Problem 3:

I am not able to connect with the high speed connection.
TCPIP::192.168.2.101::INSTR' ==> Working
TCPIP::192.168.2.101::hislip0' ==> Not working (resource is not present in the system.)

I also tried with the following, not working either:
TCPIP::192.168.2.101::hislip
TCPIP::192.168.2.200::hislip0::INSTR

Sebastien