id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
5764	OPC UA seems to miss DataType at the nodes attributes	anonymous	Martin Sjölund	"Hi,

just played around with the OPC UA Server in OpenModelica and tried to connect with different clients (UA Expert, Beckhoff TwinCat PLC OPC IO, Android Suppanel) to a simple model (Just a sine source, a resistor and ground). Connection to the OPC-UA server works fine and in UA Expert I can set values and watch variables changing.

But there seems to be something broken between version 1.12 and 1.13+. The OPC clients can't reliably determine the datatype for the attributes presented by the OPC-UA server. UA Expert may work around that somehow, but the other clients I tested, reject using the variables - due to the missing variable information?

Please see the following screenshots:

'''OpenModelica v1.12.0'''
[[Image(https://s19.directupload.net/images/200102/5fuez2h6.png)]]

'''OpenModelica v1.13 to v1.15-dev'''
[[Image(https://s19.directupload.net/images/200102/kqrkdtc3.png)]]

"	defect	assigned	high		*unknown*	v.1.15.0-dev