Why do I lose port information when I make a copy of the S-function builder block in Simulink?

I have an S-function builder block that has two input ports. When I copy this block to the same model, the S-function block loses this port information. The block graphically shows that it has two ports, but when I go into the block, it shows the default input/output port information.

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 14 Service Pack 2 (R14SP2). For previous releases, please read below for any possible workarounds:

The ability to copy S-function builder blocks without losing port information is not available in Simulink.

Currently to work around this issue, try the following:

1. Create an S-function builder block and completely build the required S-function.

2. Add another S-function block to the model and configure this block to have the same:

    a. name

    b. parameter list

as the S-function builder block. You may need to build a mask for the S-function parameters.

3. Now make copies of the new S-function.