Issue with project curves to surface

Having an issue projecting some curves.

In this case, projecting loses some lines (in this examples drops 2 out of 20 curves)

Works well in most other cases.

Could use any ideas for a work around.
project-lines.gh (17.0 KB)

when I open your file I get 20 projected curves.

What are your document unit settings in Rhino file?

also, I was wondering if you should move all the curves above/out of the surface your are projecting on, but it is actually working fine when some are below and some above.

Thank you, it was the units. I was working to 0.00005", also called half a tenth. changing this to 0.0001, a 'tenth of a thousandth" in machinist terms, cured it.

Thank you I did not think to check it.

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