Posted by Lambertus on Mar 29, 2021; 6:40am
URL: https://forum.librecad.org/Librecad-keeps-adding-blocks-to-block-list-tp5715315p5720474.html

Thank you.

There are 54 "3-tab" shingles in each of the two drawings.

Following your suggestion, I copied (crtl + C) and pasted (ctrl + V)  the shingles, the tar paper and the roof sheathing to a new file (Involves seven layers).
That removed all blocks from the block list except for "0.5-tab" shingle block (a block of a small piece of a "3-tab" shingle).
It removed the "1-tab" and "3-tab" blocks from the block list, even though the blocks are still visible in the drawing.
Highlighting the elements to copy also highlighted some ghost elements (invisible), in a similar configuration as the shingles, in the lower left of the drawing near the 0,0 coordinate. I saved the file and re-opened it. All the block elements that were no longer in the block list did not get saved and only the sheathing, tar paper and "0.5-tab" shingles remained. Still have some ghost elements near 0,0.

I had not used this technique before because when i copy and pasted into an existing drawing with layers, the paste would loose all layer information. Importing a file as a block was the only way to retain all layer information.

If you want to play with the files, they are uploaded here. Sorry about the large file with the many blocks.
shop-south_roofing-copy_test.dxf
shop-south_roofing-only_2021-03-28.dxf

RE: using Windows version through Wine.
I may do that because I might never finish these drawings using the Linux version

Version: 2.1.2
Compiler: GNU GCC 6.2.0
Compiled on: Sep 17 2016
Qt Version: 5.9.5
Boost Version: 1.62.0

On Ubuntu 18.04