Hi @Anonymous @Rafal.Gaweda
you solved this with using API, i'm currently using dynamo with a python script, and try to achieve also to set the labels(because it's annoying that the label is the case name).
this is the API information.

this is my setup which creates the loadcase, only with the case name as label.

This is the python code:
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
from System import Environment
user = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
clr.AddReferenceToFileAndPath(user +r"\Dynamo\Dynamo Core\1.3\packages\Structural Analysis for Dynamo\bin\RSA\Interop.RobotOM.dll")
from RobotOM import *
from System import Object
#The inputs to this node will be stored as a list in the IN variables.
LoadCaseName = IN[0]
LoadCaseNumber = IN[1]
LoadCaseLabel = IN[2]
application = RobotApplicationClass()
project = application.Project
structure = project.Structure
labels = structure.Labels
loads = structure.Cases
#output
Caseeigengewicht = structure.Cases.CreateSimple(LoadCaseNumber,LoadCaseName,IRobotCaseNature.I_CN_PERMANENT,IRobotCaseAnalizeType.I_CAT_STATIC_LINEAR)
Caseeigengewicht.Records.New(IRobotLoadRecordType.I_LRT_DEAD)
LoadRecord = Caseeigengewicht.Records.Get(1)
LoadRecord.SetValue(IRobotDeadRecordValues.I_DRV_Z,-1)
LoadRecord.SetValue(IRobotDeadRecordValues.I_DRV_ENTIRE_STRUCTURE,True)
OUT = LoadCaseNumberThis is the error i get when i add "IRobotSimpleCase.label"

This is what i have added in the code.
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
from System import Environment
user = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
clr.AddReferenceToFileAndPath(user +r"\Dynamo\Dynamo Core\1.3\packages\Structural Analysis for Dynamo\bin\RSA\Interop.RobotOM.dll")
from RobotOM import *
from System import Object
#The inputs to this node will be stored as a list in the IN variables.
LoadCaseName = IN[0]
LoadCaseNumber = IN[1]
LoadCaseLabel = IN[2]
application = RobotApplicationClass()
project = application.Project
structure = project.Structure
labels = structure.Labels
loads = structure.Cases
#output
Caseeigengewicht = structure.Cases.CreateSimple(LoadCaseNumber,LoadCaseName,IRobotCaseNature.I_CN_PERMANENT,IRobotCaseAnalizeType.I_CAT_STATIC_LINEAR,IRobotSimpleCase.label(LoadCaseLabel))
Caseeigengewicht.Records.New(IRobotLoadRecordType.I_LRT_DEAD)
LoadRecord = Caseeigengewicht.Records.Get(1)
LoadRecord.SetValue(IRobotDeadRecordValues.I_DRV_Z,-1)
LoadRecord.SetValue(IRobotDeadRecordValues.I_DRV_ENTIRE_STRUCTURE,True)
OUT = LoadCaseNumberCan some one tell me what i should change to set the label for the loadcase.
I have added both dynamo files.
Thanks in advance,
Gr Edward.