Hi Tony,
I assume you are using the GPIBNI driver? The way that driver works, once it is loaded it starts an interrupt thread that regularly checks in every 100 milliseconds. When it check’s in, it calls iblines, ibwait, and Threadibsta. Unloading the driver will stop the interrupt thread, but then will also stop communication from HTBasic, so is probably not the work around you are looking for.
If this is causing problems by filling up your logs, you could try using the new VISA driver that is included in our latest release of HTBasic. The new VISA driver does things more natively and shouldn’t have the same problems.
Thanks,
Pat
