It is not possible anymore to create any HDFlexo based file due to license error.
After upgrading Nexus to 10.1.3, the following error appears in the Merge when you try to create HDFlexo based files: "Your machine is not licensed to run HDFlexo, so this job cannot be started".
Since Nexus 10.1.3, the header of the LEN file contains a reference to HDFlexo. This change requires an HDFlexo license on the CDI as well.
If the HDFlexo license is not immediately available, you could downgrade Nexus to version 10.1.2 as it does not require the license in the CDI.