I am using dialog callbacks to validate data entry, As an example I have created a subsystem containing a Gain block with parameter G and entered the following in subsystem mask, parameters, dialog callback; if str2num(get_param(gcb, 'G')) Error evaluating 'MaskCallback' callback of Subsystem block (mask) ' untitled/Subsystem '. --> Gain is negative Can anyone tell me why I get the error evaluating the callback? I am running R2011a on Mac OS X Mountain Lion Thanks

Callback evaluation error using Simulink Masked Subsystem Dialog Callbacks

11 次查看（过去 30 天）

Chris Emerson 2012-11-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/53283-callback-evaluation-error-using-simulink-masked-subsystem-dialog-callbacks

I am using dialog callbacks to validate data entry, As an example I have created a subsystem containing a Gain block with parameter G and entered the following in subsystem mask, parameters, dialog callback;

if str2num(get_param(gcb, 'G'))<0 error('Gain is negative.') end

now when I enter a negative value for the Gain I get the following;

--> Error evaluating 'MaskCallback' callback of Subsystem block (mask) '<a href="matlab:open_and_hilite_system ('untitled/Subsystem')">untitled/Subsystem</a>'. --> Gain is negative

Can anyone tell me why I get the error evaluating the callback?

I am running R2011a on Mac OS X Mountain Lion

Thanks