After the model has been fully or partially built by calling functions of the NAG optimization modelling suite, e04tjc may be used to set or modify a single element

b_{ij}

in the sparse linear constraint matrix

B

previously defined by e04rjc. This might be particularly helpful when a linear constraint needs to be extended after new variables have been added to the model by e04tac.

See Section 4.1 in the E04 Chapter Introduction for more details about the NAG optimization modelling suite.

4 References

None.

5 Arguments

1: $handle$ – void * Input: On entry: the handle to the problem. It needs to be initialized (e.g., by e04rac) and must not be changed between calls to the NAG optimization modelling suite.
2: $idlc$ – Integer Input: On entry: $i$ , the number of the linear constraint, i.e., the row index of the element $b_{ij}$ in the linear constraint matrix to be changed.

Constraint: $1 \leq idlc \leq m_{B}$ , where $m_{B}$ is the total number of linear constraints in the problem.
3: $icolbj$ – Integer Input: On entry: $j$ , the column (variable) index of the element $b_{ij}$ .

Constraint: $1 \leq icolbj \leq n$ , where $n$ is the total number of decision variables in the problem.
4: $bij$ – double Input: On entry: $b_{ij}$ , the new value of the element in the linear constraint matrix $B$ .
5: $fail$ – NagError * Input/Output: The NAG error argument (see Section 7 in the Introduction to the NAG Library CL Interface).

6 Error Indicators and Warnings

NE_ALLOC_FAIL: Dynamic memory allocation failed.
See Section 3.1.2 in the Introduction to the NAG Library CL Interface for further information.
NE_HANDLE: The supplied handle does not define a valid handle to the data structure for the NAG optimization modelling suite. It has not been properly initialized or it has been corrupted.
NE_INDICES: On entry, $icolbj = ⟨ value ⟩$ and $n = ⟨ value ⟩$ .
Constraint: $1 \leq icolbj \leq n$ .

On entry, $idlc = ⟨ value ⟩$ and $m_{B} = ⟨ value ⟩$ .
Constraint: $1 \leq idlc \leq m_{B}$ .
NE_INTERNAL_ERROR: An internal error has occurred in this function. Check the function call and any array sizes. If the call is correct then please contact NAG for assistance.
See Section 7.5 in the Introduction to the NAG Library CL Interface for further information.
NE_NO_LICENCE: Your licence key may have expired or may not have been installed correctly.
See Section 8 in the Introduction to the NAG Library CL Interface for further information.
NE_PHASE: The problem cannot be modified right now, the solver is running.
NE_SETUP_ERROR: There are no linear constraints in the problem.