Simulink: How can I throw errors with the initialization commands in a masked subsystem?

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Hello! I would like to evaluate parameters of a masked subsystem within the initialization code. The mask is created with the mask editor. The initialization code calls a m-function and passes the parameters of the block to this function. If e.g. the mass is negative, I wanto to display an error in the matlab command window.
if mass<0
error('mass is negative!')
end
If I use this code at the beginning of my initialization code, no error is displayed and the block doesn't initializes properly.
Does anyone know a solution? Thanks!
  1 Kommentar
Kaustubha Govind
Kaustubha Govind am 25 Okt. 2012
Why not use the parameter callback function instead? That is probably the right place to validate parameters anyway.

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Akzeptierte Antwort

Martin
Martin am 26 Okt. 2012
@Jeremy: It doesn't seem to work either...
@Kaustubha Govind:
I already tried to evaluate the parameters with the parameter callback function. The Dialog Callback calls an m-function:
hidden_block_cb(gcb,get_param(gcb, 'm'))
This seems to work if I type e.g. 5 in the block dialog box.But I would like to save the parameter mass=5 in the matlab workspace and then type 'mass' in the block dialog box. But then I get an error:
Error due to multiple causes ->Undefined function or variable 'mass' ->Error evaluating 'MaskCallback' of ... Undefined function or variable 'mass'.
I think to problem is that the get_param. But
hidden_block_cb(gcb,m)
doens't work either.
???

Weitere Antworten (2)

Jeremy
Jeremy am 25 Okt. 2012
Perhaps the error is being thrown too low? Try throwAsCaller, and see if that works.

Carlos
Carlos am 18 Sep. 2014
Hi,
I am having a similar issue, and I do not understand the proposed solution of using hidden_block_cb.
From the mask initialization tab I am trying to check the value of a variable. If loc == 999 I want to raise a warning. i.e. I want a warning to be shown in the Matlab command line. But using warning('message') or error('message') does nothing. Any ideas on how to do this? Thanks!

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