Error?

What is this error?

Calculation for differential and algebraic state derivatives failed.

How i resolve this?

[Walter Roberson]

Please use better titles for your posting. "Error?" could mean just about anything, and does not help readers find information that is relevant to _their_ work.

[vignesh kumar]

Zone 1 gg ??? Operands to the and && operators must be convertible to logical scalar values.

Error in ==> pro at 836 if SB1(n)==0 && SB2(n)==0 && SB20(n)==0 && (IB1~=0 IB2~=0 ||IB20~=0)

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Answer 1

[Rick Rosson]

Please help us help you:

1. What product(s) are you using?
2. Describe what you were doing just prior to receiving this error?
3. Can you post your MATLAB code or a screen shot of your Simulink Model?

Thanks!

Rick

[Nuno]

I using Simulink...

My model simulate a charger that use a voltage of battery...

My model is this: http://img23.imageshack.us/img23/701/56959075.png

[Arnaud Miege]

The reasons for this are likely to be similar to your other question:

http://www.mathworks.co.uk/matlabcentral/answers/11809-help-in-solver-error

which is probably the divide by zero error. Fix this first and then see if have another error.

[Jan]

@Rick: I like your matter-of-fact style to answer questions, which cannot be answered. This is valuable for the forum. +1

[Rick Rosson]

@Jan: I am trying very hard to stay focused on facts and data, but it is becoming very challenging. Thanks for the kudos!

:-)

Answer 2

[vignesh kumar]

Zone 1 gg ??? Operands to the and && operators must be convertible to logical scalar values.

Error in ==> pro at 836 if SB1(n)==0 && SB2(n)==0 && SB20(n)==0 && (IB1~=0 IB2~=0 ||IB20~=0)

>>