Trying to update the callout tool to use our Standards. And I've created a new tool on our standard palettes, and redirected to a modified Callouts (Imperial).dwg but I keep getting this error that no symbol exists. Even if the file is essentially a copy of the original.

The new file is located on the server which isn't a problem for any other standards based files, but this one is giving me some trouble.

Any guidance on this will help me out a ton. Thanks.