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C3D-0053 · READ-ONLY: ParcelSegments on C-PROP-LINE, guarded reads [PSEG-CPROP-2] rejected

Previous run died with eNotApplicable on a style read. Every property read is individually guarded. Lists each C-PROP-LINE parcel segment with endpoints, length, style and description, plus every parcel with its site, layer, style and area. No changes.

C# payload

// READ-ONLY. The ParcelSegments on C-PROP-LINE revert when their layer is changed - the layer is
// driven by the parcel style, not the entity.
//
// Last run died with eNotApplicable on a style read (StyleName/StyleId on a segment whose parent
// does not support it). Every property read here is individually guarded so one bad member cannot
// kill the run. Nothing is modified.
var civil = CivilApplication.ActiveDocument;
var ms = (BlockTableRecord)Tx.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(Db), OpenMode.ForRead);

Func<Func<string>, string> safe = f => { try { return f(); } catch (System.Exception ex) { return "<" + ex.GetType().Name + ">"; } };

Log("=== ParcelSegments on C-PROP-LINE ===");
int n = 0;
foreach (ObjectId id in ms) {
    ParcelSegment ps = null;
    try { ps = Tx.GetObject(id, OpenMode.ForRead) as ParcelSegment; } catch { continue; }
    if (ps == null) continue;
    string lay = safe(() => ps.Layer);
    if (lay != "C-PROP-LINE") continue;
    n++;

    Log("");
    Log("SEGMENT [" + ps.Handle + "]  layer=" + lay);
    Log("   start/end  " + safe(() => String.Format("{0:F2},{1:F2}  ->  {2:F2},{3:F2}",
        ps.StartPoint.X, ps.StartPoint.Y, ps.EndPoint.X, ps.EndPoint.Y)));
    Log("   length     " + safe(() => {
        var c = ps.BaseCurve;
        return c.GetDistanceAtParameter(c.EndParam).ToString("F2");
    }));
    Log("   style      " + safe(() => ps.StyleName));
    Log("   desc       " + safe(() => ps.Description));
}
Log("");
Log("C-PROP-LINE segments found: " + n);

Log("");
Log("=== every parcel: site, layer, style, area ===");
foreach (ObjectId sid in civil.GetSiteIds()) {
    var site = (Site)Tx.GetObject(sid, OpenMode.ForRead);
    foreach (ObjectId pid in site.GetParcelIds()) {
        var p = (Parcel)Tx.GetObject(pid, OpenMode.ForRead);
        Log("   site \"" + safe(() => site.Name) + "\"  parcel \"" + safe(() => p.Name)
            + "\" [" + p.ObjectId.Handle + "]  layer=" + safe(() => p.Layer)
            + "  style=" + safe(() => p.StyleName)
            + "  area=" + safe(() => p.Area.ToString("F2")));
    }
}