The issue could be due to changes in the 2021b version of the Matlab engine, which may have affected the way that Struct objects are handled, try using the following approach:
- Check whether the Struct objects you're passing from Java to Matlab have been properly initialized and populated with data.
- Simplify your code and test with a basic Struct object to isolate the issue. For example, create a Struct object with just one field and pass that to Matlab to see if it is recognized properly.
- Try using a different method of passing data between Java and Matlab, such as using a cell array instead of a struct array. This can sometimes help to avoid compatibility issues.
Hopefully, one of these suggestions will help you resolve the issue. Please refer to the following documentation link for further guidance:
