Opened 16 years ago

Closed 15 years ago

#11 closed defect (fixed)

Mensagem "unknown eval error" durante a integração

Reported by: Paula Bettio Staudt Owned by: Rafael de Pelegrini Soares
Priority: major Milestone:
Component: EMSO Solvers Version: 0.9.50
Keywords: Cc:

Description

Com o solver default, durante a integração aparece a seguinte mensagem (problema aleatório, para exemplificação):

Advancing the independent variable from 620 to 630

Advancing the independent variable from 630 to 640

Event detected at time 636.339 restarting the system...

NLA solver converged.

Advancing the independent variable from 636.339 to 640

unknown eval error

unknown eval error

unknown eval error

unknown eval error

Advancing the independent variable from 640 to 650

Advancing the independent variable from 650 to 660

Advancing the independent variable from 660 to 670

Advancing the independent variable from 670 to 680

A integração segue com estas mensagens aparecendo, mas depois de um tempo falha.

Attachments (2)

sample_columnReact.mso (5.8 KB) - added by Paula Bettio Staudt 16 years ago.
benzeno_tolueno1.mso (5.4 KB) - added by Rafael Winck Espinoza 16 years ago.

Download all attachments as: .zip

Change History (6)

Changed 16 years ago by Paula Bettio Staudt

Attachment: sample_columnReact.mso added

comment:1 Changed 16 years ago by Rafael de Pelegrini Soares

Status: newassigned

Na versão de desenvolvimento apresenta o seguinte output:

Checking the consistency for 'Startup_ReactiveDistillation' in file '/home/rafael/Desktop/sample_columnReact.mso'...
Number of variables:  690
Number of equations:  690
Degrees of freedom: 0
Structural differential index: 3
Extra Equations:    866
Extra Variables:    383
Dynamic degrees of freedom:  207
Number of initial Conditions: 81
System is not consistent!

Precisa ser verificado então se de fato é um problema.

comment:2 Changed 16 years ago by Paula Bettio Staudt

Esse erro ocorre quando o modelo apresenta potências fracionárias que geram raízes de números negativos, como no caso do modelo de prato (x1.5).

Changed 16 years ago by Rafael Winck Espinoza

Attachment: benzeno_tolueno1.mso added

comment:3 Changed 16 years ago by Rafael Winck Espinoza

Version: 0.9.470.9.50

Semelhante erro ocorre com o arquivo anexo 'benzeno_tolueno1.mso '. A seguir um trecho final do output: "Intermediate step: 1.06773 Intermediate step: 1.1431 unknown eval error Intermediate step: 1.21846" Após isso a simulação pára sem nenhuma outra mensagem específica.

comment:4 Changed 15 years ago by Rafael de Pelegrini Soares

Resolution: fixed
Status: assignedclosed

A versão de desenvolvimento (0.9.52) parece não apresentar este problema.

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