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error duplicate variable name

Posted 9 nov 2011, 08:14 GMT-5 Version 5.1 4 Replies

Noritaka Yusa
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Hi,

I am trying to make simulation about inspecting flaw in a plate by coil. My model is attached.
I got the error as the title. Could anyone help me? Thank you advance.

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4 Replies Last Post 10 nov 2011, 20:42 GMT-5
John H.
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Posted: 1 decade ago 9 nov 2011, 09:02 GMT-5
The problem is the parameter "h" that you've defined. You have to rename it to something else as "h" is already pre-defined by Comsol to refer to the mesh element size.
The problem is the parameter "h" that you've defined. You have to rename it to something else as "h" is already pre-defined by Comsol to refer to the mesh element size.
Edgar Kaiser
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Posted: 1 decade ago 9 nov 2011, 09:27 GMT-5
Hi,

it is in general a good advice to avoid short, particularly single-letter variables, because some of them, like x, y, z, r, t, etc. are used by Comsol.
What is new to me so far is that Comsol now creates an error, or a warning, if such a conflict occurs.

Is that new to 4.2a?

Cheers
Edgar
Hi, it is in general a good advice to avoid short, particularly single-letter variables, because some of them, like x, y, z, r, t, etc. are used by Comsol. What is new to me so far is that Comsol now creates an error, or a warning, if such a conflict occurs. Is that new to 4.2a? Cheers Edgar
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 9 nov 2011, 14:57 GMT-5
Hello

it seems to depend on the use of the variable, I tried, in v4.2a, to redefine h and it worked without errors, but I was not inluding h into the solver sequence s othat might be the reason.

I find it nice that COMSOl checks when we redefine the internal variables, but sometimes it's of interest to be able to, too ;)

--
Good luck
Ivar
Hello it seems to depend on the use of the variable, I tried, in v4.2a, to redefine h and it worked without errors, but I was not inluding h into the solver sequence s othat might be the reason. I find it nice that COMSOl checks when we redefine the internal variables, but sometimes it's of interest to be able to, too ;) -- Good luck Ivar
Noritaka Yusa
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Posted: 1 decade ago 10 nov 2011, 20:42 GMT-5
Hi,

Thank you very much. My version is 4.2. Now I am clear about the problem:-)

Best regards
Hi, Thank you very much. My version is 4.2. Now I am clear about the problem:-) Best regards

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