Hello Luqi, how are you? Sorry, I do not have the answer for your three questions, but why don't you run your simulation for the time desired to delay the output and then start it again with IO_CheckSteps? It seems that will solve your problem in an easier way. Att, Daniel. Em sáb., 5 de abr. de 2025 às 06:26, z 67 <luqizhang2@gmail.com> escreveu:
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*Dear all,*
I am encountering an issue with checkpoint file metadata when using the <FILTER TYPE="Checkpoint"> configuration in Nektar++ 5.3.0. I would appreciate your guidance to resolve this.
Previously, I used global parameters in session.xml (e.g., IO_CheckSteps) to output checkpoint (.chk) files, which correctly included metadata such as <Time>, <TimeStep>, and <ChkFileNum> in the <Provenance> section. However, after switching to the <FILTER> configuration to *delay checkpoint output until 15 seconds* (see configuration below), the generated .chk files now *lack critical metadata*:
<FILTER TYPE="Checkpoint"> <PARAM NAME="OutputFile">un</PARAM> <PARAM NAME="OutputFrequency">10000</PARAM> <PARAM NAME="OutputStartTime"> 15 </PARAM> </FILTER>
The missing metadata includes:
<ChkFileNum>
<Kinvis>1.4<SessionName0><Time><TimeStep>
This causes .dat files converted via FieldConvertto *lack SOLUTIONTIME*, preventing time-series visualization in Tecplot.
So I just have few questions below:
1.
Is there an error in the <FILTER> configuration that causes metadata omission? 2.
Are there additional parameters required to preserve <Time>, <TimeStep>, etc., when using the Checkpoint filter, which can solve this problem. 3.
Is this a known issue in Nektar++ 5.3.0?
Thank you in advance for your assistance.
Best regards, Luqi Zhang _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users