Can't attach parts in EVA Construction Mode even though I should be able to

[It'snorocketscience]

So while stripping off some extra parts off my Mun lander, I started having trouble re-attaching parts.

The situation:

 

The problem:

I'm trying to re-attach the "twitch" engine in these pictures, but the game won't let me for some reason. I'm really baffled by this - the engine should be light enough for Bill to lift (0.08t), and it isn't obstructed by other parts, and Bill is certainly close enough to attach it to the lander, right? I'm not sure why the game isn't letting me do this. If anyone has any guess, I'd be really grateful. Thanks!

Note - The re-attachment was working fine a few minutes prior - I re-attached that exact same part to the lander earlier while landed on the Mun before removing it again and getting stuck where I am now.

[jimmymcgoochie]

Try attaching it to something else, detaching it and then attaching it to the lander where you want it. EVA construction has been a little bit glitchy when I've used it but this seemed to fix this issue when I came across it.

[Admiral Fluffy]

If all else fails, just reboot the game.