We have two GPIB-USB-HS and a GPIB-USB-HS+ . but, now , the GPIB-USB-HS only isn't good when use it on GPIB communication. we have two equipments. one equipment can communication by the convert cable. on the other hands on the other equipment case, one the convert cable only couldn't communication. so, if you know software to check it. Could you tell me about where can i download it? Thank you for your time. Thank you for reading.