Hello Mohan,

As far as I understand, you are referring to the connector Apache Cassandra Cluster Monitor | Catalog | dataminer.services.

The error message gives some pointers:

• The failure occurs in QAction 3 upon attempting to connect to a Cassandra node.
• Error "The path is not of a legal form" probably refers to an incorrect or missing path to some library.

If this is a problem with library dependencies in the connector, you should be able to resolve this issue by updating the connector to the latest version (1.2.0.8 as of today), or by re-uploading the connector if you're already on the latest version.

It might be also good to ensure that you have the latest required .NET versions installed. For DataMiner 10.5, these are .NET Framework 4.8 and .NET 8.0 (see DataMiner Compute Requirements | DataMiner Docs).

One more thing to try after updating the connector: create a new Cassandra Cluster Monitor element and try to configure it from scratch. It might be that your current element has some invalid settings which cause connection attempts to fail.

Please note that this is not a guaranteed solution, but a recommendation for troubleshooting based on the information you provided. If the steps above don't resolve the error, you might have to contact DataMiner Support for further assisstance.