User Tools

Site Tools


gams:mcp_pair_..._has_empty_equation_but_associated_variable_is_not_fixed

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

gams:mcp_pair_..._has_empty_equation_but_associated_variable_is_not_fixed [2008/01/10 10:41]
Franz Nelissen created
gams:mcp_pair_..._has_empty_equation_but_associated_variable_is_not_fixed [2008/01/10 10:41] (current)
Franz Nelissen
Line 6: Line 6:
  
 The model below will give (correctly) the same error : The model below will give (correctly) the same error :
 +<​code>​
 set i /i1,i2/; set i /i1,i2/;
 alias (i,ii); alias (i,ii);
Line 16: Line 16:
 model m /e.x/; model m /e.x/;
 solve m using mcp; solve m using mcp;
 +</​code>​
 The equation above is a  "​degenerate"​ case in the sense that the lhs vanishes. In that case the matching variable must be fixed (''​x.fx(i)=0;''​). ​ The equation above is a  "​degenerate"​ case in the sense that the lhs vanishes. In that case the matching variable must be fixed (''​x.fx(i)=0;''​). ​
  
 Most likely however you want to prevent such a situation from happening. Use an appropriate dollar condition on Most likely however you want to prevent such a situation from happening. Use an appropriate dollar condition on
 the equation such that this equation is not generated. the equation such that this equation is not generated.
- 
IMPRESSUM / LEGAL NOTICEPRIVACY POLICY gams/mcp_pair_..._has_empty_equation_but_associated_variable_is_not_fixed.txt ยท Last modified: 2008/01/10 10:41 by Franz Nelissen