creating block - error message pops up

[gisdude]

Hi all. I am trying to create a block that has a tag and prompt to enter in basic info. However when I try to insert my block, a funny error comes up that says"the tag cannot be null or contain spaces".
It's really frustating, because when i just open the block by itself as a drawing, you can enter in the values with spaces - no error pops up.

Any info would be helpful
I'm on ACAD 2004 winxp

Thx

[mockdeep]

Does this happen with every block? Can you post one of the blocks in question?

[Chris.N]

do you have spaces in the attribute tag? that's a no-no for the discovered reason. you can only have spaces in the prompt and the attribute content.

also, since you are on 2004, i can safely assume it's not a dynamic block, and will move it to the appropriate forum.