rPower errors

GAMS
1

hi everyone

I am using a model , in the equations I have this ;

XEQ… =e= (at*(dt*(EX)rhot+(1-dt)*(D)(rhot))(1/rhot));
QEQ… =e= (aq*(dq*(M)(-rhoq)+(1-dq)(D)(-rhoq))(-1/rhoq));
EDEQ… =e= ((P(‘EX’)/PP)((1-dt)/dt))**(1/(rhot-1));

I’m keep getting the following errors ::

**** Exec Error at line 174: rPower: FUNC DOMAIN: x**y, x=0,y<0
**** Exec Error at line 175: division by zero (0)
**** Exec Error at line 176: division by zero (0)

would you please explain what these errors mean ?
Any suggestions to solve this issue ??!!


Thanks in advance,
mohamed

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2

Hi Mohamed



The first thing you should do, is search both mailing lists for “division by zero” or “rpower”….

You will find some very useful answers to this question.



Cheers

Renger


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From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Mohamed Benkhadda
Sent: Freitag, 25. April 2014 02:41
To: gamsworld@googlegroups.com
Subject: rPower errors



hi everyone



I am using a model , in the equations I have this ;



XEQ… =e= (at*(dt*(EX)rhot+(1-dt)*(D)(rhot))**(1/rhot));

QEQ… =e= (aq*(dq*(M)(-rhoq)+(1-dq)*(D)(-rhoq))**(-1/rhoq));

EDEQ… =e= ((P(‘EX’)/PP)*((1-dt)/dt))**(1/(rhot-1));


I’m keep getting the following errors ::

**** Exec Error at line 174: rPower: FUNC DOMAIN: x**y, x=0,y<0
**** Exec Error at line 175: division by zero (0)

**** Exec Error at line 176: division by zero (0)


would you please explain what these errors mean ?
Any suggestions to solve this issue ??!!


Thanks in advance,
mohamed

–
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