The following limitations apply to the Identifier format control parameters:
The following autogenerated identifiers currently do not fully comply with the setting of the Maximum identifier length parameter on the Code Generation > Identifiers pane of the Configuration Parameters dialog box.
Model methods
The applicable format scheme is $R$F, and the longest
$F is _derivatives, which is 12 characters
long. The model name can be up to 19 characters without exceeding the default
Maximum identifier length of 31.
Local functions generated by S-functions or by add-on products such as DSP System Toolbox™ that rely on S-functions
Local variables generated by S-functions or by add-on products such as DSP System Toolbox that rely on S-functions
DW identifiers generated by S-functions in referenced
models
Fixed-point shared utility macros or shared utility functions
Simulink®
rtm macros
Most are within the default Maximum identifier length of
31, but some exceed the limit. Examples are
RTMSpecAccsGetStopRequestedValStoredAsPtr,
RTMSpecAccsGetErrorStatusPointer, and
RTMSpecAccsGetErrorStatusPointerPointer.
Define protection guard macros
Header file guards, such as _RTW_HEADER_$(filename)_h_,
which can exceed the default Maximum identifier length of 31
given a filename such as $R_private.h.
Include file guards, such as _$R_COMMON_INCLUDES_.
typedef guards, such as
_CSCI_$R_CHARTSTRUCT_.
In some situations, the following identifiers potentially can conflict with others.
Model methods
Reentrant model function arguments
Local functions generated by S-functions or by add-on products such as DSP System Toolbox that rely on S-functions
Local variables generated by S-functions or by add-on products such as DSP System Toolbox that rely on S-functions
Fixed-point shared utility macros or shared utility functions
Include header guard macros
The following external identifiers that are unknown to the Simulink software might conflict with autogenerated identifiers.
Identifiers defined in custom code
Identifiers defined in custom header files
Identifiers introduced through a non-ANSI® C standard library
Identifiers defined by custom TLC code
Identifiers generated for simulation targets might exceed the Maximum identifier length. Simulation targets include the model reference simulation target, the accelerated simulation target, the RSim target, and the S-function target.
Identifiers generated using a model name and bus object data type name, which are both
long names, might exceed the Maximum identifier length. For example,
a ground value variable name is generated as
<model_name>_rtZ<bus_name>.
If the model_name and bus_name are close to the
maximum identifier length, the name exceeds the maximum identifier length.