What is wrong with these blocks? Attributes are erased after Attsync

[Designer_1E]

Can anyone explain to me what is going on with these attributes?

I have attached a sample block we get from a commercial library.  When I import the block it has 8 attributes. (see example 1.jpg)

There is a tool in the library that will apply 3 more attributes to the block for tagging the product.  (see example 2.jpg) However if I use the ATTSYNC command it will erase the attributes.

It seems like the extra attributes aren't real attributes, but they can be made visible, and their values can be exported.  However if you open the block up, they are not there.

[cadffm]

Hi,

"There is a tool in the library that will apply 3 more attributes to the block" blockreference!

Attribs are attached to blockreferences and they have nothing to do with the block.

This (for us unknown) tool can add attributes to blockreferences (not a standard feature of autocad, but okay with the dwg darabase).

They are real like other attributes too.

Try it by your own:

1. Use this tool and check the block content. Command: BEDIT

Just 5 Attributdefinitions.

2. To understand attributes, test it with your own block and 2 attribut definitions!

   Insert one blockreference.

  BEDIT, delete one attdef and create a new on with another name (or move& rename  one of them).

  Insert one new blockreference.

BEDIT, delete both attdefs and create a new on with another name (or move& rename  one of them, delete the other one).

Check out the attributesof your blockreferences.

Attdefs (non constant) are just templates to Attributes are create attribut to new created blockrefs, independing from the block after creation.

Your tool can add them directly.

Not unusual for tools, but unusual and kind of dirty for users.

(Position locked property, is a special situation)