I found the issue. The switch IOM-Mode was in standalone. I put the system into programmable-mux mode and the command became available to change the portmode.
We have a few Dell Force10 MXL switches and I need to use the QSFP+ ports that are built in to the switch (ports 33 and 37) as 40G links (not 4x 10G). The manual says it should default to 40G, but it's not. The cables I am using do connect and show 4 10G links. The startup-config file is [URL]   I have tried: What am I missing?
Force10 MXL enable 40GB QSFP+