Hi,

We recently upgraded our testing environment to DataMiner v10.5 (self-hosted databases). The connection to Cassandra and OpenSearch was established successfully. However, we are encountering an issue with the monitoring protocol “Apache Cassandra Cluster Monitor V1.0.2.8”, where we are unable to connect to the hosts.

We are receiving the following errors:

2026/02/25 11:07:17.643|CSN2.txt|SLProtocol - 16948 - CSN2|2156|CManagedScript::Load|ERR|-1|Compilation failed for QAction 1

(4053,8): error CS0246: The type or namespace name 'ApacheCassandraCluster' could not be found (are you missing a using directive or an assembly reference?)
(4055,26): error CS0246: The type or namespace name 'ILoadBalancingPolicy' could not be found (are you missing a using directive or an assembly reference?)
(4061,32): error CS0246: The type or namespace name 'Host' could not be found (are you missing a using directive or an assembly reference?)
(4061,10): error CS0246: The type or namespace name 'HostDistance' could not be found (are you missing a using directive or an assembly reference?)
(4071,25): error CS0246: The type or namespace name 'Host' could not be found (are you missing a using directive or an assembly reference?)

The Cassandra monitoring protocol was working properly on previous DataMiner versions (10.2 and 10.3).

Additionally, we have the OpenSearch monitoring protocol deployed, which is working without any issues.

Note: Cassandra and OpenSearch are deployed on same Linux host