Problem

An "Out of memory (swap device may be full)" error message is returned when attempting to generate a Hidden Line (HLN) (aka: Export Visible Edges) file.
MicroStation seems to "hang" when processing the Hidden Lines.

Solution

Use Key-in: Edges Advance, enable "Facet All Surfaces" and "Remove
Smooth Edges within SmartSolids <(>&<)> Facets".

The Hidden Line system can, at times, take a long time and/or use up a
lot of system resources. MicroStation has some tools that can be used
to speed up the process and otherwise avoid problematic solid elements
in a given file. Edges Advance contains some tools that are not
available in the normal edges tools.

With Regards to ACIS solids (in/from DWG files):
If Solid data is ACIS solids (typically solids generated in AutoCAD).
ACIS solids cannot be processed as cleanly as MicroStation native
solids, also known as "ParaSolid". ACIS solids use up much more memory
than ParaSolid solids generally do. This could cause the Virtual Memory
to be used up quickly.

Starting with MicroStation 2004 Edition 08.05.02.27...
There are new tools added to the hidden line system. They can be
accessed with the following key-in:

Key-in: EDGES ADVANCE

This opens a dialog similar to the Hidden Edges dialog, with following
added settings:
-Remove Smooth Edges within SmartSolids and Facets.
-Expand Custom Linestyles.
-Expand Hatch.
-Facet All Surfaces.

To get better and/or faster results by lowering the memory overhead,
enable "Facet All Surfaces".
This setting will cause MicroStation to facet the surfaces of the solids
instead of trying to process the solids (and intersections) itself.

To get cleaner results, that will remove the faceted edges, enable
"Remove Smooth Edges within SmartSolids <(>&<)> Facets".

Notes:
-These tools are currently in Beta form so results may vary. These
functions are fully functional in MicroStation V8 XM Edition.
-There are extra "Tiling" options in MicroStation V8 XM Edition to
further help avoid memory limitations.

Other possible Solutions:
-Increase Page file (Virtual memory).
-Move Page file to another drive.
-Increase Physical Memory (RAM).

See Also