I think this thread was erroneously marked resolved. I was able to get the spline deleted. As after I redid the map I had this happen again. I was about to go crazy, but instead I troubleshot until I came up with a workaround to get the map to open again.
- Open the map on it’s own. (not from the main tiled level that your world composer is set to)
- Right click LandscapeProxy in the World Outliner and select Duplicate.
- You will probably get a warning that your are about to copy a bunch of stuff. Select OK.
- Wait for the engine to duplicate the proxy (this can take sometime depending on the complexity of your landscape) When it’s finished you will get a bunch of overlap errors, ignore them and close the map checker dialog box.
- From the World Outliner select the original LandscapeProxy and delete it. This will remove the erroneous splines but also and valid splines as well
But at least you’ll be able to open up your map from the streamable levels again.
I put together a little video outlining the issue, the fix, and also asking for clarification from Epic on how to property handle these. I suspect it’s due to something with having the splines placed in the streaming levels.
[Here’s the link to the video.][2]