How to define the size of output in subfunctions, for C coder

Hello everybody,

I am experiencing an issue when porting a function to C with Matlab coder.

I have a function which runs inside a parfor parallel loop like

output = myfunction(id, mystruct) ;

where id is the parfor index and mystruct an input structure with one dimensional fields which are 1xn arrays, where n is variable.

inside myfunction there is a subfunction which is called inside myfunction like

output_temp = mysubfunction(mystruct.field)

where output_temp is a 1x1 variable.

Everything works in Matlab.

When I build code to port the function in C with Matlab coder, I get the following issue.

I define the input mystruct.field as unbound :1x:Inf, but at the "check for issues" stage, in the mysubfunction the coder sees mystruct.field as :Infx:Inf so that the coder sees output_temp as :1x:Inf instead of 1x1, and this generates an error. I am run out of ideas and cannot fix this...

Can you help me in fixing this, please?

Thanks in advance,

Patrizio