Why do I receive an error regarding EXIST function when calling SLUPDATE for a model in Simulink?

When calling the SLUPDATE function for a model, I receive the following error regarding EXIST function:

slupdate(my_model);

 ??? Error using ==> exist

 The first input to exist is a string.

 Error in ==> slupdate>locForceSysOpen at 385

 if exist(sys,'file') == 4,

 Error in ==> slupdate at 52

 [isLibrary, closeSimulink] = locForceSysOpen(sys);

Answer 1

[MathWorks Support Team]

This error occurs if you are calling SLUPDATE using parentheses and the model name without apostrophes. The correct syntax would be, for example:

slupdate('my_model')

or:

slupdate my_model