FlexNet licensing error -18: License server system does not support this feature

The tools were able to connect to the license server successfully. However, the server does not host the feature that the client was trying to check out. This can happen for a number of reasons. For example, DS-5 is sold as Professional and Ultimate editions. The Ultimate edition includes additional features. If you were to try using the Ultimate edition with a Professional license, you might see this error.

See the article on toolkit configuration for more information.

Another explanation could be that you have multiple license servers. For example, one server for Arm licenses and another for third party licenses. In this case, the error could indicate that you are specifying the wrong server on the search path. Check the value of ARMLMD_LICENSE_FILE on the client, and that this includes the server that hosts the Arm license. You can specify multiple license sources on the search path.