# How to check results during calculation

**URL:** <https://forums.nlr.gov/t/how-to-check-results-during-calculation/6574>\
**Category:** Computer-Aided Engineering Software Tools\
**Created:** [February 29, 2024, 3:54am UTC](https://forums.nlr.gov/t/how-to-check-results-during-calculation/6574 "2024-02-29T03:54:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Yosuke.Matsumoto](https://avatars.discourse-cdn.com/v4/letter/y/779978/32.png) [@Yosuke.Matsumoto](https://forums.nlr.gov/u/Yosuke.Matsumoto)\
**Post date:** [February 29, 2024, 3:54am UTC](https://forums.nlr.gov/t/how-to-check-results-during-calculation/6574/1 "2024-02-29T03:54:54Z")

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Thank you for all your help.

I have a question regarding OpenFAST.  
Is there any way to check the results during the calculation?

What I want to do is the following.  
If I set the “.fst” “TMax” to 3600s, the out and outb files cannot be output until the calculation of 3600s is completed.  
I would like to output out files and outb files up to that point at specified time steps, for example, 600s,1200s,1800s…3600s.

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**Author:** ![Jason.Jonkman](https://dub1.discourse-cdn.com/nrel/user_avatar/forums.nlr.gov/jason.jonkman/32/3086_2.png) [@Jason.Jonkman](https://forums.nlr.gov/u/Jason.Jonkman)\
**Post date:** [February 29, 2024, 1:29pm UTC](https://forums.nlr.gov/t/how-to-check-results-during-calculation/6574/2 "2024-02-29T13:29:55Z")

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Dear @Yosuke.Matsumoto,

Actually, the text-based _.out_ output file from OpenFAST is written time-step-by-time-step, so, you should be able to see the results live as the file is being written. The binary-based _.outb_ output file from OpenFAST cannot be written until the end of the simulation because the full min-max range of data is needed in the scaling operation performed when generating the data for the binary output (the full min-max range cannot be known until the full time history is known).

Best regards,

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**Author:** ![Yosuke.Matsumoto](https://avatars.discourse-cdn.com/v4/letter/y/779978/32.png) [@Yosuke.Matsumoto](https://forums.nlr.gov/u/Yosuke.Matsumoto)\
**Post date:** [March 1, 2024, 12:56am UTC](https://forums.nlr.gov/t/how-to-check-results-during-calculation/6574/3 "2024-03-01T00:56:34Z")

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Thank you for your response.  
I understand.