Purpose
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Stores vdata information in an external file.
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Return value
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Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
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Description
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VSsetexternalfile writes data in the vdata identified by the parameter vdata_id in the file named filename, at the byte offset specified by the parameter offset.
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Only the data will be stored externally. Attributes and all metadata will remain in the primary HDF file.
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IMPORTANT: The user must ensure that the external files are relocated along with the primary file.
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Read the Reference Manual page on SDsetexternalfile for more information on using the external file feature.
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