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Unmap a Bulk Data frame

Use STFUNM (SCFUNM) to unmap data which have been mapped before by a call to STFMAP. No further reference can be made to the data of this frame within the program. The Descriptors of the Bulk Data Frame are still accessible via the `file id'. If necessary, the data are converted back to the original format automatically.

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Last update: 1998-10-23