Hi Nishant,
This error occurs when some operation in the model returns "Inf" or "NaN" output. To debug this error, open Configuration Parameters and navigate to Diagnostics > Data Validity. Set the diagnostic "Inf or NaN block output" to error. When you run your simulation, you will get the error as follows:
An error occurred while running the simulation and the simulation was terminated
Caused by:
Block 'BlockName' outputs 'NaN' for element x of output port x at major time step 0
Where 'BlockName' is the block in which the error is thrown.
This block either divides by 0 or outputs NaN, which creates an Inf which generates this error. Therefore, avoid division by zero in the logic and check operations for possible NaN outputs.
