MDF object reading error numerical value returned as physical.

While using the read function to get data from an MDF object (created via CANape) I am getting an error relating to datatype.

dat = mdf(MF4);

timeseries = read(dat,compare{3,2},compare{3,1});

Which outputs: Numerical value returned as physical value unsensible. I've included channel details below.

Note that compare is just a cell containing channel group numbers and channel names. When I try to change the conversion from "Numeric" to "None" using the code below my output is Unrecognized property 'Conversion' for class 'asam.MDF'

dat = mdf(MF4);

dat.Conversion = "None";

Any ideas on how to proceed?

Here are details of the channel being read (channel names ommited):

Unit: 'rad'

Type: FixedLength

DataType: IntegerUnsignedLittleEndian

NumBits: 16

ComponentType: None

CompositionType: None

Ref.: MATLAB R2017

[Walter Roberson]

Conversion did not become a property until R2021a