8.6.3 Changing Run-time Parameters

FreeForm ND includes three arguments that let you change run-time parameters according to your needs. One argument lets you specify local buffer size, another indicates the number of records to process, and the third indicates which variables to process.

-b local_buffer_size

Option flag followed by the size of the memory buffer used to process the data and format files. Default buffer size is 32,768. You many want to decrease the buffer size if you are running with low memory. Keep in mind that too small a buffer may result in unexpected behavior.

-c count

Option flag followed by a number that specifies how many data records at the head or tail of the file to process. If count > 0, count records at the beginning of the file are processed. If count < 0, count records at the tail or end of the file are processed.

-v var_file

Option flag followed by the name of a variable file. The file contains names of the variables in the input data file to be processed by the FreeForm ND program. Variable names in var_file can be separated by one or more spaces or each name can be on a separate line.