Special unicode characters used in Name of IFCWALL cause no geometry to be displayed.

[santiagoIT]

If you open the attached file in XBimXplorer 4.0, no geometry is displayed at all.

Using XBimXplorer 5.1 very few IFC elements are displayed.

The file contains IFCWALL's which have a Name with uncommon unicode chars:
'\S\ ciana 1'

If \S\ is stripped out, all geometry displays fine.

might be useful:
BimVision displays all geometry, and just seems to ignore those chars.

unicodeCharIssue.zip

[andyward]

Seems like there's a couple of different issues in this model throwing things out:

1. The 0x0C (ASCII 12 = Form Feed?) in the unicode character name. E.g. on IfcWall Entity 1777
2. Invalid parameter 5 on IfcRelVoidsElement ( # -1)

Issue 2 needs fixing at the source as it's just invalid output.
Issue 1 we'd need to check with the Parser experts (@martin1cerny or @CBenghi ) - I'm not sure if this is valid, but I guess we could at least be more graceful of invalid ASCII chars in the input.

When I spotfixed the data by removing the invalid characters we got a much better result

The lack of openings in the walls is likely down to Issue 2

[martin1cerny]

IFC is defined to be an ASCII file, so Unicode characters are not allowed. However, I'll have a look how we can handle it better in the parser to make it more resilient.