Question

Previously in Matlab Stateflow 7.1 all variables and functions had to be included before they can be referred to in the state diagram or else it would throw an error when you tried to parse the diagram.

But now in 7.7 it doesn’t catch those kinds of errors. Its still compiling the diagram because it catches other syntactic errors.

Am I missing an option somewhere? Can this be turned on?

Answer 1

The release notes to Stateflow 7.2 say:

Parsing a Stateflow Chart Without
Simulation No Longer Detects
Unresolved Symbol Errors

To detect unresolved symbol errors in
a chart, you must start simulation or
update the model diagram. When you
parse a chart without simulation or
diagram updates, the Stateflow parser
does not have access to all the
information needed to check for
unresolved symbols, such as exported
graphical functions from other charts
and enumerated data types. Therefore,
the parser now skips unresolved symbol
detection to avoid generating false
error messages. However, if you start
simulation or update the model
diagram, you invoke the model
compilation process, which has full
access to the information needed, and
unresolved symbols are flagged.

For more information, see Parsing
Stateflow Charts and Resolving Symbols
in the Stateflow and Stateflow Coder
User’s Guide.

So it looks like that you need to “start the simulation, update the model diagram, or invoke the model compilation process” to get the flags.