Have scanned forum past posts and this has come up before but no answer (not from myself but another poster).
From time to time in a reasonably large .dxf file (3MB) I can no longer select individual entities. This is typically when using Trim or Offset. I can still select via rectangular select but not single clicks. You can sometimes make it work if you *very* carefully select in the centre of the line. Meaning only a single pixel will work.
From experience the problem tends to appear after copying and pasting a large number of elements in the drawing. But this may be anecdotal.
I can "fix" it by selecting all, copying and then pasting into a new file and save as a new name.
As per the previous post on this topic I have tried changing the scale but this doesn't change things.
While on this note, is it possible to have LibreCad "snap" to the closest item when clicking? or set a radius for clicks and it chooses the closest object?
Thanks for the suggestion, but the copy solution did not seem to work for me as that I saw no option to copy into the new drawing. However, I did find a solution whenever the "Lengthen" object command gave a "No entity found" message. What worked for me was to:
1) Close out the drawings and LibreCAD;
2) Navigate to the working directory and carefully delete the .dfx~ file. Obviously, I am careful and don't use wildcards as that I don't want to delete the .dfx file. I assume the "tilde" file is some kind of redo/history file that gets recreated when starting an edit session.
Once the file was gone all the Lengthen functionality worked fine.