CreateOffsetAlignment Python script Fatal Error

Civil3D
,
6

Hey Guys,
I extended the code with offset profile. It is in the 2021.1 API guide.
https://help.autodesk.com/view/CIV3D/2021/ENU/?guid=176ac8e5-a883-70d8-5617-015c9d466419
Needs some refinement (for e.g. making sure the right parent profile is used, and error massages) but does the job.

adoc = Application.DocumentManager.MdiActiveDocument
editor = adoc.Editor
civdoc = CivilApplication.ActiveDocument

align = IN[0]
alignmentstyle = IN[1]
offset = IN[2]
offsetprofilestyle = IN[3]
slope = IN[4]

result = []

def cmoalignments(align,alignmentstyle,offset,offsetprofilestyle,slope):
	global adoc
	global editor
	global civdoc
	
	try:	
		with adoc.LockDocument():
			with adoc.Database as db:
				with db.TransactionManager.StartTransaction() as t:
					slopepercent = slope/100
					n = align.Count
					for i in range(0,n):
						# get parent alignments to offset
						alignment = align[i]
						alignmentId = alignment.InternalObjectId
						al = t.GetObject(alignmentId, OpenMode.ForRead)
						alname = al.Name
						# offset alignment name suffix and side variables
						bbsz = "BBSZ"
						jbsz = "JBSZ"
						lso = offset * -1
						rso = offset * 1 
						# get parent profile
						profileId = al.GetProfileIds()[0]
						profile = t.GetObject(profileId, OpenMode.ForWrite)
						profilename = profile.Name
						# Left offset Alignment
						leftoffsetalname = alname + " " + bbsz
						leftoffsetId = al.CreateOffsetAlignment(lso)
						leftoffsetal = t.GetObject(leftoffsetId, OpenMode.ForWrite)
						leftoffsetal.Name = leftoffsetalname
						leftoffsetal.StyleName  = alignmentstyle
						result.append(leftoffsetalname)
						# Left offset Alignment Profile
						loprofile = profile.CreateOffsetProfileBySlope(leftoffsetalname,leftoffsetalname,offsetprofilestyle,slopepercent)
						# Right Offset Alignment
						rightoffsetalname = alname + " " + jbsz
						rightoffsetId = al.CreateOffsetAlignment(rso)
						rightoffsetal = t.GetObject(rightoffsetId, OpenMode.ForWrite)
						rightoffsetal.Name = rightoffsetalname
						rightoffsetal.StyleName  = alignmentstyle
						result.append(rightoffsetalname)
						# Right offset Alignment Profile
						roprofile = profile.CreateOffsetProfileBySlope(rightoffsetalname,rightoffsetalname,offsetprofilestyle,slopepercent)				
					t.Commit()

	except Exception() as ex:
		result.append(ex.message)
	return result

# Assign your output to the OUT variable.
OUT = cmoalignments(align,alignmentstyle,offset,offsetprofilestyle,slope)
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