Posted by Lambertus on Apr 02, 2021; 8:12pm
URL: https://forum.librecad.org/Librecad-keeps-adding-blocks-to-block-list-tp5715315p5720508.html


Used your guidance and made some test drawings of shingles using the blocks from the block list, copying using the move/copy tool and the matrix tool from block properties.

No duplicate blocks appear by inserting a block from the block list.
No duplicate blocks appear when using the move/copy tool to copy a drawn block, either as a single or a multiple.
Duplicate blocks only appeared when using the crtl+c copy and crtl+v past. Each paste creates one duplicate of the single block even if copy pasting many of the blocks at one time.

Tried to figure out the matrix tool and gave up.

In conclusion, what Gary S said works for not creating duplicate blocks in the drawing.

So, I went back through my archived versions of the two drawings (North and South sides of the building) and discovered:

1) that the shingle blocks were first created, and their drawing as roof shingles first done, in the North view on November 25, 2016. No duplicates are in the block list.

2) The duplicate blocks appeared in the block list of the South view November 26, 2016. The drawing had no shingles. In other words, even though the block list had the original and all duplicate shingle blocks I see today, the drawing had no shingles drawn. Therefore, I must have done something while copying the shingles from the North view to the South view to create the block duplicates.

3) The duplicate blocks appeared in the North view on April 20, 2020. I probably did that by copying the roof of the South view to the North View after changing the South view roof's rafter design, thereby importing the duplicate shingle block problem.

I tried to duplicate the creation of the duplicate shingles as in 2016, without success. Today I used crtl key copy paste between the files to recreate the duplicate block list. That did not work. Just same problem of just bringing over one of the blocks to the block list.

Unfortunately, what I did is still a mystery. It may be a consequence of not using an accepted methodology for copying between files. It is not a consequence of how I drew the shingles.

Thank you again for helping with this.