To install Spaces macro copy the following files from this zip file to your DataCAD Macros folder:

  SpaceRefresh.dmx
  SpaceRefresh.ini (do NOT overwrite if file already exists)
  SpaceRefresh.msg
  Spaces.dmx
  Spaces.lbl
  Spaces.msg
  Spaces.pdf

Optionally, also copy the following file (this is an example file that is referred to in Section 2.5.2 of the documentation that deals with importing space definitions from Excel - it is not required unless you want to work through that example).
  SpacesExample.xlxs


THE FIRST TIME YOU RUN THE MACRO please do so using Option S9 from DataCAD's Edit Menu. This will ensure that some settings are initialised correctly.  After you have run the macro at least once you can add it to the Toolbox drop-down menu and use it from there if you wish.
Note that if you missed this instruction and ran the macro from the Toolbox drop-down the first time then there is still a reasonable chance that it did initialise correctly so there is no need to redo anything unless you have problems with the macro (in which case you may need to run it from the Edit Menu to fix the issues).