Yes, that's correct Graeme, no serial ports. Good diagnosing! Robert -----Original Message----- From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of Graeme Gill Sent: 04 June 2014 09:53 To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Re: Issue with illumread robert@xxxxxxxxxxxxxxxxxx wrote: > The error comes up whenever I run illumread, at the point where the > instrument is selected (for example with option 1) if there is no instrument > connected. OK - I guess you have no serial ports on the computer ? If I disable serial instrument support I can reproduce it. Graeme Gill.