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I am new to Solidworks, my part has several holes (created using the Hole Wizard) which needs Centerlines drawn to connect them.

However when I click on the Centerline tool in the Drawing, then click on one hole followed by another hole, I get the error message

Unable to create centerline from the selected entities

What should be the correct way to create the centerlines?

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    $\begingroup$ [I'm not in front of SolidWorks, so I can't reproduce your issue.] I remember seeing this message myself too. Select centers of the holes, rather than the edge of the hole. $\endgroup$ – Nick Alexeev Oct 17 '17 at 17:08
  • $\begingroup$ @NickAlexeev My memory is pretty shaky on Solidworks; but that sounds like the kind of thing that would work. It could be trying to find a "centreline" between two circles, which doesn't really make sense, because circles are not points. $\endgroup$ – JMac Oct 17 '17 at 18:47
  • $\begingroup$ @NickAlexeev I cant seem to select the center of the hole because theres nothing in the center... $\endgroup$ – Nyxynyx Oct 17 '17 at 19:00
  • $\begingroup$ create the centre points first - join with the line then add the holes after... just guessing though as I don't have / use solidworks but used other packages... $\endgroup$ – Solar Mike Oct 18 '17 at 12:34
  • $\begingroup$ @SolarMike Thanks for the suggestion, in Solidworks I am not able to select the center points with the tool used for creating centerlines. $\endgroup$ – Nyxynyx Oct 18 '17 at 14:38
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You should be able to sketch a line using the line tool (under the Sketch tab) enter image description here, and then simply select "For Construction"

Under the sketch tab, you should also be able to access the Centerline tool that will skip this step for you. Click the drop-down menu on the Line tool, and select Centerline Centerline Sketch Tool . Alternatively, select Tools > Sketch Entitities > Centerline

Centerline

The "centerline" tool you tried using (under the Annotation tab) essentially will draw a line midway between two other lines. Notice that the icon for the tool appears to be a side profile of a shaft. Centerline Icon

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