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## [Help-glpk] a simple question about using glpk

**From**: |
Wei-Lun Hung |

**Subject**: |
[Help-glpk] a simple question about using glpk |

**Date**: |
Thu, 09 Mar 2006 10:50:39 -0500 |

**User-agent**: |
Mozilla Thunderbird 1.0.5 (X11/20050711) |

Hi, there

`I am using glpk to solve scheduling problem. I encountered a simple
``problem but couldn't figure out why is that.
``The error message I got is 'lpx_load_matrix: ja[55] = 7; column index
``out of range"
``Does this mean I cannot have fewer structural variables than variables
``in the raw constrains.
`For example, the objective function of my problem is like this:
Min A1I1+ A2I2 + ... A6I6 (there are only six columns)
st.
C11 + C12 + ... + C19 = C1 (I have 9 variables here)
...
How could get around of this problem?
Thanks in advance.
Wei-Lun

**[Help-glpk] a simple question about using glpk**,
*Wei-Lun Hung* **<=**