xerr1.gms : External Equation Errors: RHS wrong

**Description**

This model checks if Cmex creates an error as expected when dealing with external equations. The errors we want to get are: - RHS value not integer in =X= equation - RHS value out of range in =X= equation - RHS value not unique in =X= equation Contributor: Lutz Westermann

**Small Model of Type : ** GAMS

**Category :** GAMS Test library

**Main file : ** xerr1.gms

```
$title External Equation Errors: RHS wrong (xerr1,SEQ=493)
$Ontext
This model checks if Cmex creates an error as expected when dealing with
external equations. The errors we want to get are:
- RHS value not integer in =X= equation
- RHS value out of range in =X= equation
- RHS value not unique in =X= equation
Contributor: Lutz Westermann
$Offtext
$call gmsunzip -q xerr.zip
$if %system.buildcode% == VS8 $call mv -f vs8.dll xerr.dll
$onecho > err.gms
set i / i1*i4 /
variables x(i), z;
equations zdef;
zdef.. sum(i, ord(i)*x(i) ) + (card(i)+1)* z =X= 1.5;
model xerr 'External equations' / all /;
solve xerr using nlp minimizing z;
$offecho
$call =gams err.gms lo=%GAMS.lo%
$if not errorlevel 1 $abort should get error because of RHS not integer
$onecho > err.gms
set i / i1*i4 /
variables x(i), z;
equations zdef;
zdef.. sum(i, ord(i)*x(i) ) + (card(i)+1)* z =X= 2;
model xerr 'External equations' / all /;
solve xerr using nlp minimizing z;
$offecho
$call =gams err.gms lo=%GAMS.lo%
$if not errorlevel 1 $abort should get error because of RHS out of range
$onecho > err.gms
set i / i1*i4 /
variables x(i), z;
equations zdef,zdef2;
zdef.. sum(i, ord(i)*x(i) ) + (card(i)+1)* z =X= 1;
zdef2.. sum(i, ord(i)*x(i) ) =X= 1;
model xerr 'External equations' / all /;
solve xerr using nlp minimizing z;
$offecho
$call =gams err.gms lo=%GAMS.lo%
$if not errorlevel 1 $abort should get error because of RHS not unique
```