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Opening and closing data files

hds_open,filename$<$_char$>$,[mode$<$_char$>$][,status]

Opens a HDS data file. Only one file can be open at a time.
mode READ, UPDATE
status (returned) 0: no error; $-1$: error occurred

hds_close

Closes the current HDS file.



Christian Hummel 2009-10-20