I'm trying use blocks' 'link to file' feature to update all the drawings containing that block by modifying the block itself.

It looked like this idea works because after I saved a drawing with a block, I modified that block(and overwritten to the previous block file) and the drawing showed the modified block when re-opned.

Then I tried to make a template with blocks so that any drawings created via this template can be changed by changing the desired block file rather than opening them all up and changing manually.

I figured out that I cannot use sheet format as it does not store links. So I created a template to test the block linkage but it didn't really work.

Say I got a template which contains a block with "A".

If I then modify the block in a different drawing and overwrite the previous block file by block "B", the template still shows "A".

If I then save this wrong template as a drawing, the drawing shows "A"- even when it's re-opened, it's still A.

But then If I change the block file into "C", the drawing shows "C".

I'm not sure whether this is a limitation or a bug

How can I solve this?

Chris