Evaluation of elaborate function error in HDL coder

I get the following error when trying to generate HDL from a simulink model with HDL Coder:

Error: Evaluation of elaborate function on class hdldefaults.NonRestoreDivide failed with the error message: MATLAB:UndefinedFunction: Undefined function 'Signed' for input arguments of type 'hdlcoder.tp_single'.

The model runs fine in simulink. I cannot find anything helpful about any terms in this message and no link is given to any specific point in the model. I first got the error when I added a number of single precision floating point multilpy and divide blocks into the design. I reworked it to use all multiplies and a single reciprocal block but still get the same problem. I am using prelease matlab 2019b. What is the root of the problem and is there some way to track it down to a specific point in the design?

[paul b]

All the product blocks used the Shift-Add architecture. Switching back to Linear eliminates the error. Still not clear what exactly is happening.

Answer 1

[Nishant Gupta]

Refer to the following post relevant to this error message:

https://www.mathworks.com/matlabcentral/answers/96005-why-do-i-get-the-error-undefined-function-or-variable

[Kiran Kintali]

This seems like a general guidance and unrelated to the internal HDLCoder error. Please see my answer to the question.

Answer 2

[Kiran Kintali]

This is an unexpected error from HDLCoder. Will it be possible to share the model? We can evaluate and provide the workaround.