Hi,
>> int dwg-1 not shown attricute block named *U11 is not shown.
- You have a block with annotation scale that can be turned off/on . So ( as alfred said ) "Why do you think that there should exist any block-insertions there?" [Click on below image]

- A block named with an asterisk and a "U" (like *U18) in AutoCAD is known as an Anonymous Blocks. These are blocks without a user-assigned name. They are automatically generated by AutoCAD to support features like dynamic blocks, hatch patterns, tables, or associative dimensions. You normally can't use AutoCAD block editing commands with anonymous blocks.
Examples of anonymous blocks:
- *U### - general anonymous blocks
- *E### - anonymous blocks from non-uniformly scaled blocks - when exploded (e.g. solids, regions)
- *D### - anonymous dimensions (dim blocks)
- *X### - anonymous hatches (hatch blocks)
- *A### - anonymous groups, DGN linetype blocks
- *T### - anonymous blocks in tables
- *S### - anonymous blocks of 3D views
My suggestion is to redefine the block you're using correctly. Afterward, you'll find your problem is automatically resolved.
Imad Habash
