MATLAB: Am I unable to run a model created in R13 with the Fixed-Point Blockset Conversion block in Simulink 6.1 (R14SP1)

conversionfixedpointsfix_fix2fixsimulink

I have a model that contains at least one Fixed-Point Blockset Conversion block in Simulink 5.0 (R13). However, when I try running it in a newer version of Simulink 6.1 (R14SP1), the model gives the following error:

 S-Function 'sfix_fix2fix' does not exist

Can my model run anymore?

Best Answer

We have verified that there was a change in the Fixed-Point Blockset Conversion block between R13 and Simulink 6.1 (R14SP1).

To work around this issue, run the SLUPDATE function to replace obsolete versions of blocks in a model with the latest versions. For more information regarding the SLUPDATE function, refer to the following documentation link:

http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/slref/slupdate.html

Or, if you have the documentation installed, type the following command in the MATLAB command window:

web([docroot,'/toolbox/simulink/slref/slupdate.html'])

Related Solutions

MATLAB: Do I receive a missing S-function error when upgrading the model containing Fixed-Point blocks from Simulink 5.1 (R13SP1) to Simulink 6.0 (R14)

The design in Simulink 6.0 (R14) automatically maps the old fixed-point blocks to their new replacements when the model is loaded. Blocks with broken links typically do not give any trouble until the model is used with a newer version of Simulink. When used with a newer version of Simulink, however, blocks with broken links often cannot be used without repair.

You may use the MATLAB command

slupdate(gcs);

to automatically correct all the broken links for the old Fixed-point blocks.

MATLAB: Do I receive an error message that cannot find some variable after running Fixed-Point Advisor in Simulink Fixed point 6.1 (R2009a)

This issue has been resolved in Simulink Fixed Point 6.2 (R2009b).

To work around this issue in Simulink Fixed point 6.1 (R2009a), execute the following steps.

1. You need to modify the following file.

 $MATLABROOT\toolbox\fixedpoint\fixedpointtool\@fxptui\@sfchartresult\isInSubsysToScale.m

$MATLABROOT is the root directory where MATLAB is installed and can be known by executing the following command at the MATLAB Command Prompt.

matlabroot

2. Add the following line of code to this file

blkDiagram = bdroot(topSubSystemToScale.getFullName);

right after this line in the existing code

subsys = fxptui.getsfsubsys(h);

3. Once you have modified the file, save it and execute the following command at the MATLAB Command Prompt.

rehash toolboxcache

4. Restart MATLAB.

Best Answer

Related Solutions

MATLAB: Do I receive a missing S-function error when upgrading the model containing Fixed-Point blocks from Simulink 5.1 (R13SP1) to Simulink 6.0 (R14)

MATLAB: Do I receive an error message that cannot find some variable after running Fixed-Point Advisor in Simulink Fixed point 6.1 (R2009a)

Related Question