MATLAB: Does Real-Time Workshop throw a datatype error message even though I am not using any custom datatypes

datadatatypefixedpointreal timertwsfixsimulinksimulink fixed pointtypeworkshop

Why does Real-Time Workshop throw a datatype error message even though I am not using any custom datatypes?
I have a model that uses fixed-point datatypes. It simulates without a problem. However, when I try to build my model, I get the following error message.
 Error using ==> make_rtw
 Error using ==> tlc_c
 Error using ==> rtwgen
 Invalid run-time parameter registered by block 'GHz/5.2 GHz DFE (fxp)/CCE & LS GI Detection
 (fxp)/metric and phase difference accumulator/Unit Delay1'. 
 All run-time parameters must resolve to a valid Simulink datatype.

Best Answer

This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:
Simulink can handle fixed-point data of length up to 128 bits. Real Time Workshop can only handle a fixed-point data length of 32 bits. The documentation of this limitation is available by entering the following command at the MATLAB command prompt:
web([docroot '\toolbox\fixpoint\c7_code3.html#3988'])
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