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# 4.8 Verbose Operation

Most of the programs take an optional -V argument which will run the program in the ``verbose'' mode (see Section 4.4.8). Verbose will write to standard error information about the progress of the operation you are running. Verbose reports things such as counts of points read, names of data files processed, convergence of iterative solutions, and the like. Since these messages are written to stderr, the verbose talk remains separate from your data output.

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