Hidden call of m-file

I have a subsystem which only contains a ground and a terminator block connected to each other. When I double-click the subsystem-block, it calls an m-file. Where can this functionality be hidden?

[Purushottama Rao]

CAN U ADD THE PRINT SCREEN?

Answer 1

[Azzi Abdelmalek]

Right click on your subsystem, click on properties, there may be any callback

[Swantje]

You were right. But I didn't know I had to highlight the right callback function in the list in order to see the content. Now I found it. Thanks.

Answer 2

[Titus Edelhofer]

An alternative is to go to the simulink preferences and enable "Callback tracing". Then you will see a printout in the command window for each fired callback.

[Swantje]

Thanks, I found it! Callback tracing helped. Didn't know I had to highlight the callback function in order to see the content. That's why I couldnt find it before.

[Titus Edelhofer]

Glad to hear. For the next time: there should have been a "*" in front of the non empty callback.

[Swantje]

Ups, sorry, I didnt know I could not accept both answers. The tracing actually helped me more.

[Titus Edelhofer]

No worries at all! When I wrote this it overlapped with you already accepting Azzi's answer which is perfectly fine ...