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And  I use commond FieldConvert -m C0Projection mesh.xml **.fld **-C0Proj.fld. 


The <EXPANSIONS> in mesh.xml is as same as that in initial-condition.xml. 

<EXPANSIONS>

        <E COMPOSITE="C[33]" NUMMODES="4" TYPE="MODIFIED" FIELDS="rho,rhou,rhov,E" />

    </EXPANSIONS>


Could someone give me some advice?



At 2025-02-23 17:10:32, "Gao" <feigao2024@126.com> wrote:

Hello,

I have much discontinuous (across element interface) distribution of variable in the fluid field. Why this happened? Then I want to use C0Projection module to smooth the fluid field. My mesh is third order, but the error comes ou below, and the other module of FieldConvert works.

Fatal   : Level 0 assertion violation
Variable index out of range.
terminate called after throwing an instance of 'Nektar::ErrorUtil::NekError'
  what():  Level 0 assertion violation
Variable index out of range.

Could someone give me some advice?

With best regards