https://sourceforge.net/p/linux-gpib/support-requests/30/2021-03-18T08:13:52.143000ZRecent changes to 30: libgpib invalid descriptor Debian102021-03-18T08:13:52.143000Z2021-03-18T08:13:52.143000ZBeninio Mbilahttps://sourceforge.net/u/malkowkiorg/https://sourceforge.net7a423d68031238e4462531e4243e9c54ebe2e08d

<div class="markdown_content"><p>I have installed all the gpib driver from sourceforge.net and it works fine with the ibtest but when I use pyvisa library I have the following issue:</p> <blockquote> <blockquote> <blockquote> <p>rm = pyvisa.ResourceManager()<br/> print (rm.list_resources()) </p> </blockquote> </blockquote> </blockquote> <p>libgpib: invalid descriptor<br/> libgpib: invalid descriptor<br/> libgpib: invalid descriptor<br/> ('GPIB0::15::INSTR',) // BUT I CAN STILL READ the list_resources</p> <p>pyvisa info gives:</p> <p>Machine Details:<br/> Platform ID: Linux-4.19.94-ti-r50-armv7l-with-debian-10.8 //beaglebone Black<br/> Processor:</p> <p>Python:<br/> Implementation: CPython<br/> Executable: /usr/bin/python3<br/> Version: 3.7.3<br/> Compiler: GCC 8.3.0<br/> Bits: 32bit<br/> Build: Jul 25 2020 13:03:44 (#default)<br/> Unicode: UCS4</p> <p>PyVISA Version: 1.11.3</p> <p>Backends:<br/> ivi:<br/> Version: 1.11.3 (bundled with PyVISA)<br/> Binary library: Not found<br/> py:<br/> Version: 0.5.1<br/> ASRL INSTR: Available via PySerial (3.4)<br/> USB INSTR: Available via PyUSB (1.0.2). Backend: libusb1<br/> USB RAW: Available via PyUSB (1.0.2). Backend: libusb1<br/> TCPIP INSTR: Available<br/> TCPIP SOCKET: Available<br/> GPIB INSTR: Available via Linux GPIB (b'4.3.4-rc2 r<span>[1955]</span>')<br/> GPIB INTFC: Available via Linux GPIB (b'4.3.4-rc2 r<span>[1955]</span>')<br/> sim:<br/> Version: 0.4.0<br/> Spec version: 1.1</p> <p>Do you how I get rid of this issue?</p> <p>Thanks for your help.</p></div>