You can delete all timestamps or you can select a group of one or more timestamps to delete.
To delete timestamps for a data group, do the following:
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From the Work with Data Groups display, type 41 (Timestamps) next to the data group you want and press Enter.
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The Work with DG Timestamps display appears. Type a 4 (Delete) next to the timestamps you want to delete and press Enter.
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A confirmation screen appears. Press Enter.
To selectively delete a range of timestamps, do the following:
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Type the command DLTDGTSP and press F4 (Prompt).
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The Delete Data Group Timestamps display appears. Specify values you want for the Data group definition prompt.
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Specify the values you want for the Starting date and time prompt and for the Ending date and time prompt, then press Enter.