A copy of the byte swapping code in the HDEVIO class in the DAQ library was made for the hdl3 program for use in the online. Some minor changes to it were made, but then a fairly major bug was found. Specifically, the setting of Nwords to len-2 when it seems like it should be bank_len-1 It's likely this bug is also in the DAQ library. However, I'm puzzled why it has not caused errors. Some more study is needed to understand this before implementing the fix.