pass non-numeric data to simulink

i want to evaluate a dlnetwork object in simulink. output of dlnetwork (type casted to double) will drive other blocks

i have used evalin to load workspace variable to inside matlab block of simulink. but when i want to run this model on parallel mode, everyitme i need to transfer all base workspace variabels, which creates lot of overhead.

i saw a post saying to define dlnetwork as input to matlab block and change scope to parameter, place matlab block inside masked subsystem.

i have followed it but, i keep getting error Expression 'dlnetwork' for type of data 'dlnet' did not evaluate to a valid type. Invalid setting for data type in 'testmdl/sys/matlabblock': The specified data type cannot be recognized.

kindly suggest ways to solve the issue