# Error while solving Optimetrics

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• Last Post 20 August 2019
adityak.eee17 posted this 20 February 2019

Hello

I have been trying to obtain the thrust vs velocity characteristics of a linear motor, for which I created a parameter vel in the Motion Setup. The simulation runs for the initial value of vel = 0 m/s, but gives the following errors when optimetrics is set up to solve for velocities varying from 0 to 9 m/s, in steps of 1 m/s:

[info] A variation (vel='1m_per_sec') has been requested using the following machines: Local Machine. (3:09:00 PM  Feb 20, 2019)

[info] User Defined Primitive: LinearMCore - One-turn length: 416.977 (mm). (3:09:01 PM  Feb 20, 2019)

[error] Separate operation failed due to lump count inconsistancy. Found 2 lumps instead of expected 19 lumps. (3:09:01 PM  Feb 20, 2019)

[error] Body could not be created for part Rph because of invalid parameters of this part or some of its parent part/coordinate system. (3:09:01 PM  Feb 20, 2019)

...

Find conduction path: 'R_1 (Rph_1_Section1)' is not on any conduction path(s).  Please make sure that the it is applied to a conducting object. (3:09:03 PM  Feb 20, 2019)

...

Null body found for part Rph. (3:09:03 PM  Feb 20, 2019)

...

Null body found for part Rph_Section1. (3:09:03 PM  Feb 20, 2019)

...

Find conduction path: 'R_1 (Rph_1_Section1)' is not on any conduction path(s).  Please make sure that the it is applied to a conducting object. (3:09:03 PM  Feb 20, 2019)

...Similar messages for all other vel values...

[info] Parametric Analysis is done. (3:093 PM  Feb 20, 2019)

The strange thing is: when I go to the design properties and manually change the value of vel to, say, 1m/s, the simulation runs fine. The parameter variation is no longer automatic as I want it to be. I have to change vel manually.

If you have any suggestions to make the optimetrics analysis work, kindly help me out. Thank you.

adityak.eee17 posted this 05 April 2019

It may be that an excitation surface is not being moved with the geometry.

In my model, the band consists of a moving aluminium sheet and back iron only. The excitation surface (assuming it means the current/voltage sources) lies outside the band and does not move. Is it required to be inside the band?

I checked the parameter unit and it is fine (m/s).

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Mark Solveson posted this 02 April 2019

Here are a few things to check:

Check the units of the variable as defined in the Parametric setup.
After the Solution Analyze, you can right click on ParametricSetup1 -> View Analysis Result, select a variation from the table, and click on Apply.  This may help identify which the variations are called and diagnose where the issue is.

It may be that an excitation surface is not being moved with the geometry.

balajisriram15 posted this 20 August 2019

Hi Aditya, Balaji here from NIT, Can you share your Email ID or contact number to discuss regarding Maxwell?

my Ph No: +91 9884646838