Hello, with windows 7 and a recent inkscape download, I'm having trouble creating guides from my drawing. I did manage this once with success, but shortly afterwards inkscape crashed before I had chance to save it and I have tried to recreate my steps to no avail.

I used the bezier tool to draw straight lines (ctrl-draw) and select all/object to guides

The first time round, it worked a treat but since the crash all I get is the second image - see above.

any ideas much appreciated

I was wondering if it because my lines might not be dead straight for some reason - it seems very hard to double click when drawing a straight line without the line ending up slightly curved on the second click.

The feature 'object to guides' can more easily be used with rectangles. I don't think it's meant to be used with straight lines. See also: http://tavmjong.free.fr/INKSCAPE/MANUAL ... romObjects

For creating guides with regular distances, or other specific properties, one of the extensions that are made for this may be useful:
https://inkscape.org/en/~samueldellicou ... uide-tools
There's also one included in Inkscape, which has fewer options.

To get lines with the Bézier tool that are just vertical or horizontal, try the vertical-and-horizontal lines only mode of the tool (look into the tool's control bar, there are four modes available currently).

Objects to guides will probably make more guides than you need anyway.

I'd consider pulling a guide to the center and then double-clicking the guide to open the edit panel and move it "relative" the amount needed. Repeat for each guide.