Caution - Stoptime Less Than Starttime. Set Stop Timeandtryagain; Check Card In Slot (Save Off?) - HP 8591C User Manual

This message indicates that the ending date or time occurs before the starting
date and time.
To solve this problem:
Reenter the stop date and time. Remember that the time is entered in a
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24-hour, hour, minute format.
This message indicates that the analyzer cannot write to the RAM card
because the RAM card has not been inserted into the memory card reader or
the write-protect switch on the RAM card is set to the write-protect position.
To solve this problem:
Insert the RAM card in the analyzer's memory card reader.
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Move the write-protect switch away from the "SAFE" position. See
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"Formatting a RAM Card" in Chapter 3 for more information.
I -
If You Have a Problem
Error Messages
4-5