Unable to cast object of type Gurux.DLMS.GXStructure to type Gurux.DLMS.GXArray

By Karl, 1 April, 2026
Forums
Gurux.DLMS

After upgrading the Gurux.DLMS Nuget package from version 9.0.2508.2201 to 9.0.2603.3001, we get the error in the subject, when trying to read association view. I have tested this on EMH and LG E850 meters, but it might be an error that affects all metertypes.

ReadDataBlock(Client!.GetObjectsRequest(), reply);
Client.ParseObjects(reply.Data, false); <--- This throws the error.

Client is a GXDLMSSecureClient object.

The Exception I am getting:
Unable to cast object of type 'Gurux.DLMS.GXStructure' to type 'Gurux.DLMS.GXArray'.
System.InvalidCastException: Unable to cast object of type 'Gurux.DLMS.GXStructure' to type 'Gurux.DLMS.GXArray'.
at Gurux.DLMS.GXDLMSClient.ParseSNObjects(GXByteBuffer buff, Boolean onlyKnownObjects, Boolean ignoreInactiveObjects)
at Gurux.DLMS.GXDLMSClient.ParseObjects(GXByteBuffer data, Boolean onlyKnownObjects, Boolean ignoreInactiveObjects)
at Gurux.DLMS.GXDLMSClient.ParseObjects(GXByteBuffer data, Boolean onlyKnownObjects)

Karl

1 month 1 week ago

I have now tested some more meter types, and it failes on these metertypes:
EMH LZQJ
LG E850

And it works on these metertypes:
CEWE Prometer 100
CEWE Premier 550
EMH SGM
MetCom
LG E360

I have not been able to test CEWE ProQ 100, as I currently do not have access to one of these meters.

Kurumi

1 month 1 week ago

Hi,

There was an issue with short name referencing. This is now fixed to version 9.0.2604.0701.

BR,
Mikko

Karl

1 month 1 week ago

Thanks Mikko!

I just found the problem 20 seconds before I was notified about your answer.