[CRYPTIC]: Delete Face (beta) fails with "The array doesn't have an item at index X"

[bcorey]

Paste minimal KCL source that produces a cryptic error

frontProfile = sketch(on = XZ) {
  line1 = line(start = [var 0mm, var 0mm], end = [var 0mm, var 60mm])
  coincident([line1.start, ORIGIN])
  vertical([line1.end, ORIGIN])
  line2 = line(start = [var 0mm, var 60mm], end = [var -29.04mm, var 57.46mm])
  coincident([line2.start, line1.end])
  line3 = line(start = [var -29.04mm, var 57.46mm], end = [var -36mm, var 18mm])
  coincident([line2.end, line3.start])
  line4 = line(start = [var -36mm, var 18mm], end = [var -30.71mm, var -12mm])
  coincident([line3.end, line4.start])
  line5 = line(start = [var -30.71mm, var -12mm], end = [var -25mm, var -12mm])
  coincident([line4.end, line5.start])
  line6 = line(start = [var -25mm, var -12mm], end = [var -25mm, var 0mm])
  coincident([line5.end, line6.start])
  horizontal([line6.end, ORIGIN])
  line7 = line(start = [var 0mm, var 0mm], end = [var -25mm, var 0mm])
  coincident([line7.start, line1.start])
  coincident([line7.end, line6.end])
  vertical(line6)
  angle([line1, line2]) == 95
  distance([line1.start, line1.end]) == 60
  line8 = line(start = [var -36mm, var 18mm], end = [var 0mm, var 18mm], construction = true)
  coincident([line8.start, line4.start])
  vertical([line8.end, ORIGIN])
  horizontal(line8)
  coincident([line8.end, line1])
  distance([line8.start, line8.end]) == 36
  distance([line7.start, line7.end]) == 25
  angle([line3, line8]) == 100
  distance([line6.start, line6.end]) == 12
  horizontal(line5)
  angle([line4, line8]) == 80
  distance([line8.end, line7.start]) == 18
}
sideProfile = sketch(on = -YZ) {
  line1 = line(start = [var 0mm, var -12.42mm], end = [var 135mm, var -12.42mm])
  vertical([line1.start, ORIGIN])
  line2 = line(start = [var 135mm, var -12.42mm], end = [var 135mm, var 52.95mm])
  coincident([line1.end, line2.start])
  line3 = line(start = [var 135mm, var 52.95mm], end = [var 100mm, var 60.27mm])
  coincident([line2.end, line3.start])
  line4 = line(start = [var 100mm, var 60.27mm], end = [var 0mm, var 60.27mm])
  coincident([line3.end, line4.start])
  vertical([line4.end, ORIGIN])
  line5 = line(start = [var 0mm, var -12.42mm], end = [var 0mm, var 60.27mm])
  coincident([line5.start, line1.start])
  coincident([line5.end, line4.end])
  distance([line5.start, line5.end]) == 72.69mm
  vertical(line5)
  horizontal(line4)
  horizontal(line1)
  vertical(line2)
  distance([line4.start, line4.end]) == 100
  distance([line1.start, line1.end]) == 135
  distance([line2.start, line2.end]) == 65.37mm
}
hidden001 = hide(frontProfile)
region001 = region(point = [-0.0025mm, 30mm], sketch = frontProfile)
extrude001 = extrude(region001, length = 135, tagStart = $capStart001)
hidden002 = hide(sideProfile)
region002 = region(point = [59.38mm, -12.4195mm], sketch = sideProfile)
extrude002 = extrude(region002, length = 100)
solid001 = intersect([extrude002, extrude001])

edge001 = edgeId(solid001, index = 17)
chamfer001 = chamfer(
  solid001,
  tags = edge001,
  length = 5,
  angle = 75deg,
)

surface001 = deleteFace(solid001, faces = region001.tags.line1)
surface002 = deleteFace(solid001, faces = capStart001)
doorProfile = sketch(on = -YZ) {
  line1 = line(start = [var 45mm, var 52mm], end = [var 80mm, var 52mm])
  line2 = line(start = [var 80mm, var 52mm], end = [var 80mm, var 2mm])
  line3 = line(start = [var 80mm, var 2mm], end = [var 45mm, var 2mm])
  line4 = line(start = [var 45mm, var 2mm], end = [var 45mm, var 52mm])
  coincident([line1.end, line2.start])
  coincident([line2.end, line3.start])
  coincident([line3.end, line4.start])
  coincident([line4.end, line1.start])
  parallel([line2, line4])
  parallel([line3, line1])
  perpendicular([line1, line2])
  horizontal(line3)
  distance([line4.start, line4.end]) == 50
  distance([line1.start, line1.end]) == 35
  line5 = line(start = [var 0mm, var 0mm], end = [var 45mm, var 0mm], construction = true)
  coincident([line5.start, ORIGIN])
  horizontal(line5)
  distance([line5.start, line5.end]) == 45
  line6 = line(start = [var 45mm, var 2mm], end = [var 45mm, var 0mm], construction = true)
  coincident([line6.start, line4.start])
  coincident([line6.end, line5.end])
  vertical(line6)
  distance([line6.start, line6.end]) == 2
  line7 = line(start = [var 36.94mm, var 51.93mm], end = [var 0mm, var 51.93mm])
  line8 = line(start = [var 9.91mm, var 52mm], end = [var 9.91mm, var 25.48mm])
  line9 = line(start = [var 0mm, var 25.48mm], end = [var 36.94mm, var 25.48mm])
  coincident([line7.end, line8.start])
  coincident([line8.end, line9.start])
  parallel([line9, line7])
  perpendicular([line7, line8])
  horizontal(line9)
  line10 = line(start = [var 36.94mm, var 51.93mm], end = [var 36.94mm, var 25.48mm])
  coincident([line10.start, line7.start])
  coincident([line10.end, line9.end])
  line11 = line(start = [var 37mm, var 52mm], end = [var 45mm, var 52mm], construction = true)
  coincident([line11.start, line10.start])
  coincident([line11.end, line4.end])
  horizontal(line11)
  vertical(line10)
  distance([line8.start, line8.end]) == 25
  distance([line11.start, line11.end]) == 8
  line12 = line(start = [var -0mm, var -0mm], end = [var 0mm, var 51.9mm], construction = true)
  coincident([line12.start, line5.start])
  vertical([line12.end, ORIGIN])
  line13 = line(start = [var 0mm, var 52mm], end = [var 4.95mm, var 52mm], construction = true)
  coincident([line13.start, line12.end])
  coincident([line13.end, line7.end])
  horizontal(line13)
  equalLength([line13, line11])
  line14 = line(start = [var 80mm, var 52mm], end = [var 88mm, var 52mm], construction = true)
  coincident([line14.start, line2.start])
  horizontal(line14)
  equalLength([line14, line11])
  line15 = line(start = [var 88mm, var 52mm], end = [var 118.24mm, var 52mm])
  line16 = line(start = [var 118.24mm, var 52mm], end = [var 118.24mm, var 23.53mm])
  line17 = line(start = [var 118.24mm, var 23.53mm], end = [var 88mm, var 23.53mm])
  line18 = line(start = [var 88mm, var 23.53mm], end = [var 88mm, var 52mm])
  coincident([line15.end, line16.start])
  coincident([line16.end, line17.start])
  coincident([line17.end, line18.start])
  coincident([line18.end, line15.start])
  parallel([line16, line18])
  parallel([line17, line15])
  perpendicular([line15, line16])
  horizontal(line17)
  coincident([line15.start, line14.end])
  equalLength([line18, line10])
  distance([line17.start, line17.end]) == 30.24mm
}
region003 = region(point = [62.5mm, 51.9975mm], sketch = doorProfile)
windowRegion = region(point = [20mm, 51.9975mm], sketch = doorProfile)
endWindowRegion = region(point = [100mm, 51.9975mm], sketch = doorProfile)
extrude003 = extrude(
  [
    region003,
    windowRegion,
    endWindowRegion
  ],
  length = 100,
  tagEnd = $capEnd001,
  tagStart = $capStart002,
)
split001 = split(solid001, tools = extrude003)

face001 = faceId(split001[1], index = 0)
surface003 = deleteFace(split001[1], faces = face001)

Expected Behavior

All four faces should be deleted.

Actual: See video. "undefined_value: the array doesn't have an item at index 2" (or other number).

Additional Context

This is the same KCL as #11415 & #11416 but without the problematic edgeId & chamfer in #11415. It describes what happens to the code in #11416 but if you try to select multiple faces at once (or just other faces) for the delete face at the end. I really wanted to use a clean slate model for this bug report that wasn't already the subject of two others but I couldn't get it to happen quickly outside this model, sorry.

You may need to follow the reproduction steps in #11416 to get the model to a healthy state to start reproduction here.

compressed_25MB_Screen.Recording.2026-05-02.at.10.32.51.PM.mp4