ARX Model Simulation - Error -41263

Hello
I'm trying to simulate an ARX model using System Identification pallete. I don't like to write too much about my problems when one VI can explain everything - so there it is, in attachment "Model Simulation.vi" works well, while "Model Simulation PtByPt.vi" gives me error -41263 (System Identification Toolset: The System Identification Toolkit cannot retrieve the data in system model because the model type you wire in is incompatible with the system model requirements).
Can anybody tell me what am I doing wrong?
Just for reference: there was once similar topic, but unfortunately it didn't provide any answers at all: http://forums.ni.com/t5/LabVIEW/system-identification-error-41263/td-p/886077 .
Solved!
Go to Solution.
Attachments:
ARX.vi ‏23 KB

That is correct, it accepts only State-Space model. It would be good if I could read this in documentation, not by asking here or by clicking inside the actual VI...

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System identification error 41263

hi...
can somebody please explain why i am getting an error "41263-The System Identification Toolkit cannot retrieve the data in system model because the model type you wire in is incompatible with the system model requirements. " while using model simulation vi to simulate an arx model i created using estimate arx model vi?

Hi ajaleelp,
Sorry for the delayed response on this, but I have a few questions for you. Are you just receiving this error at run-time? Meaning you have no broken wires or anything, but the VI stopsat the model simulation VI?
Also, have you tried our example for model simulation? You can find it here:
C\program files\national instruments\labview [version]\examples\System Identification\Getting
Started\General.llb
This actually uses the estimate arx and model simulation VIs. So, you should be able to see if that works, and then compare it to your system.
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http://www.engineers.auckland.ac.nz/~htar006/error/ad636/capture.jpg
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Attachments:
error.zip ‏993 KB

Hi Harold,
Circuit 2
Please use the attached model. The sqrt function is causing a problem with the current SPICE engine, you can replace sqrt with pwr () function and the model should behave the same.
Circuit 1.
You need to add a semi colon to indicate comment on the line shown below. Double click on the component and select Edit Model
R_VB_C 422 500 1E6 components on these nodes
Circuit 4.
I believe this is a model issue. There are many models that were not designed to work single power supply and I believe is the case here.
Circuit 6.
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ARX Model Simulation - Error -41263

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