Verify that the source and target drawings are set to meters under the UNITS command.
Verify that the INSUNITS is set to 0 (or 4 for metric/millimeters, as long as both drawings are set to meter under UNITS).
Lastly, verify that OPTIONS>User Prefernces>Insertion Scale is set to Unspecified - Unitiless for both source and target (all that matters is that they are the same).
Where in the Block Editor would you reset a block's units?
Thanks, Matt. I didn't think about opening the Properties Palette inside the Block Editor.
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