Unable to save states of a simulink model to workspace when the model referes to other models

I want to save the states of my simulink model to the workspace. My model refers to other models using 'model reference' block. Though I changed the 'Format' option to 'Structure', I get the same warning again and again and I am unable to save the state information. Need help regarding this issue. The warning message is given below

Warning: The states in model 'MyModel' cannot be logged as a matrix because the model has model blocks. For this model you need to set the 'Format' option to either 'Structure' or 'Structure with time'. 'Format' option can be specified either on the 'Data Import/Export' page of the Configuration Parameters dialog for this model or
via input arguments of the sim command for command line simulation.

[Ryan G]

Are you changing this data logging option in the main model or the model that is being referenced?

[Shyam Mudiraj]

I am changing the data logging option in the main model as well as the refered model

[Ryan G]

Are you running the referenced model in accelerator mode? According to this

The SimState feature does not support code generation, including Model Reference in accelerated modes.

It is possible to save the state and not simstate, however, you can't restore the state without simstate.