How do I set a UInt32 type for inputs on call_method?

[Rindustrial]

I am writing client code to access an OPC server written by another vendor.

I have other client programs successfully calling methods on their server using strings and enums - but this is the first client I am writing where the input data I am sending is required to be UInt32. also - one of the inputs requires an array of 100 UInt32 values.

I don't think I am doing this right. Shouldn't there be a UInt32 standard data type that is not a ua.variant?

Thanks for the help!

await WCSclient.connect()
await WCSclient.load_data_type_definitions()
WCSnode = WCSclient.get_node("ns=2;s=Wynsoft")
WCSenums = await WCSclient.load_enums()
NextOperationEnum = WCSenums["NextOperationEnum"](1)
ContentEnumArray = []
SlotNumberArray = []
SerialNumberArray = []
for Cnt in range(100):
     ContentEnumArray.append(WCSenums["ContentEnum"](1))
     SlotNumberArray.append(ua.Variant([0],ua.VariantType.UInt32))
     SerialNumberArray.append('EA2A100123')
TrayQuantity = ua.Variant([10],ua.VariantType.UInt32)
OccupiedSlots = ua.Variant([3],ua.VariantType.UInt32)
TotalQuantity = ua.Variant([3],ua.VariantType.UInt32)
WCSinputs = ["TR100100","MG100135","ROA1286783","R1B",OccupiedSlots,TotalQuantity,NextOperationEnum,"RTJ102003",TrayQuantity,SlotNumberArray,ContentEnumArray,SerialNumberArray,"AB","CD","EF","GH","IJ","KL","MN"]
WCSoutputs = await WCSnode.call_method("2:SetMagazineData", *WCSinputs)

Here are the console out errors -
python3 /var/www/html/OpcSetMagazineData.py
Traceback (most recent call last):
File "/var/www/html/OpcSetMagazineData.py", line 98, in
asyncio.run(SetMagazineData())
File "/usr/lib/python3.8/asyncio/runners.py", line 43, in run
return loop.run_until_complete(main)
File "/usr/lib/python3.8/asyncio/base_events.py", line 616, in run_until_complete
return future.result()
File "/var/www/html/OpcSetMagazineData.py", line 84, in SetMagazineData
WCSoutputs = await WCSnode.call_method("2:SetMagazineData", *WCSinputs)
File "/usr/local/lib/python3.8/dist-packages/asyncua/common/node.py", line 697, in call_method
return await call_method(self, methodid, *args)
File "/usr/local/lib/python3.8/dist-packages/asyncua/common/methods.py", line 19, in call_method
result = await call_method_full(parent, methodid, *args)
File "/usr/local/lib/python3.8/dist-packages/asyncua/common/methods.py", line 43, in call_method_full
result = await _call_method(parent.server, parent.nodeid, methodid, to_variant(*args))
File "/usr/local/lib/python3.8/dist-packages/asyncua/common/methods.py", line 64, in _call_method
results = await server.call(methodstocall)
File "/usr/local/lib/python3.8/dist-packages/asyncua/client/ua_client.py", line 613, in call
data = await self.protocol.send_request(request)
File "/usr/local/lib/python3.8/dist-packages/asyncua/client/ua_client.py", line 155, in send_request
self.check_answer(data, f" in response to {request.class.name}")
File "/usr/local/lib/python3.8/dist-packages/asyncua/client/ua_client.py", line 164, in check_answer
hdr.ServiceResult.check()
File "/usr/local/lib/python3.8/dist-packages/asyncua/ua/uatypes.py", line 220, in check
raise UaStatusCodeError(self.value)
asyncua.ua.uaerrors._auto.BadInternalError: "An internal error occurred as a result of a programming or configuration error."(BadInternalError)

[Rindustrial]

Think I found it -