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turn Debugging of FDEval on and off.

CONOPT has a Function and Derivative Debugger that can check if the function values and derivatives computed by FDEval seem to be consistent and the derivatives are consistent with the sparsity pattern of the Jacobian.

The interpretation of DebugFV is:

• 0: No debugging (the default value)
• -1: Perform debugging in the initial point only.
• +n: Perform debugging every n’th iteration.

The value can also be defined in an options file or options routine be setting LKDEBG. Error messages and error return codes are described in Error Return Codes.

Parameters

debugfv

the flag to enable debugging of function evaluations