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Hysys Math Library Error

@hysysdynamic dynamic dynamicsimulation hysyserrors dynamicmode

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#1 halamcongtu


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Posted 30 March 2018 - 09:42 AM

Hi everyone.

I'm having trouble in starting my hysys dynamic simulation. The monitor show the error '' The pressure flow solver is unable to solve the matrix. Your specifications may be inconsistent, that is,certain variables are under or over determined.

A math error has occured in math library''

I tried a lot of ways to solve but it still doesn't work.

Can someone help me solve or give me some directions ? 

Thank you very much.

#2 AlertO


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Posted 17 April 2018 - 10:52 PM   Best Answer

Hi Halamcongtu


This message could be presented when HYSYS cannot cope with your deviation which maybe quite large. HYSYS sometimes cannot convert the model after a big impact is generated. Try to make your step change smaller or reduce your accelator to let HYSYS simulation converted.

Edited by AlertO, 17 April 2018 - 10:53 PM.

#3 Technical Bard

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Posted 18 April 2018 - 08:12 AM

The math error indicates that the solver came to a place it can't deal with - something like a divide by zero, taking a log of a negative number, or the determinant of a matrix went to zero.   This usually means you are overspecified, or have specified an impossible solution.

#4 halamcongtu


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Posted 03 May 2018 - 12:07 PM

Thank you very much. I've passed it <3

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