Hi Simon, Since the OPM components (like pipe and valves) are basically cells created in Latest version of software, they are not seen graphically directly in older versions of Microstation (XM in your case). As a work around you can try following... 1) Open the OPM DGN in XM Microstation 2) Press select all button from Edit menu 3) Use drop command on all selected components (check on all options on drop command dialog) and accept 4) This will remove the compound cell header from all the components and will open up the geometry for you. Please note that we are changing the cell structure by dropping the element which may cause some undesired effects. But this file should be good enough for you to refer in XM. Thanks,
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