How can I overcome the following Simulink error: "untitled.mat: File not found."?

I have tried to change Windows administrative rights with no sucess.

The block should use four Simulink parameters to initialize.

[Walter Roberson]

What happens if you save something into a file named untitled.mat ?

I suspect the error would shift to complaining about particular missing variables, which would give you information about what variables are expected to be stored in the file.

[Angelico Manhique]

Thanks for the answer. I have tried this, too, plus creating deliberately the four parameters in Matlab workspace and it seems not to be working.