Simulink errors are encountered related to number of bits exceeding supported maximum

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I am trying to run a Simulink model and get the error "Illegal-Fixed Point Data type: the number of bits exceeded the supported maximum". A second error "an error occurred while propogating data type "sfix128 ....".
  2 Comments
Chandrasekhar
Chandrasekhar on 27 Mar 2014
the signal might be taking more value than the data type given to the signal. can you tell the data type you have used for the signal.
Victor Barsoum
Victor Barsoum on 26 Feb 2015
I have the same error as well. I do the sum of two fixed point numbers of type (sfix67_en40), and the output data type is (sfix68_en40), and the error is:- Illegal Fixed-Point Data Type: the numbers of bits exceeded the supported maximum. An error occurred while propagating data type 'sfix68_En40' from *

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