An attempt is first made using the LUMAP runtime parameter which maps relative file paths to absolute file paths. If the program path cannot be translated by LUMAP, then dL4 uses the LIBSTRING runtime parameter to locate programs and libraries. Finally, dL4 uses the DL4LUST runtime parameter. LIBSTRING contains a space separated list of directories to search when linking, CALLing, or CHAINing to program files. This value is returned by the debugger's STATUS UNIT command and by the Msc$(6) function. DL4LUST is similar to LIBSTRING, but it is used for both program and data files. The OPEN statement does not use LIBSTRING to find data files.

Please refer to the appropriate Installation and Configuration manual for a discussion on configuring LIBSTRING.

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