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Configuration Parameter File Reference
ZDateNull
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$ZDATE response to an invalid value.
Synopsis
[Miscellaneous]    ZDateNull=n
Description
The value n determines how a $ZDATE call responds when triggered by an invalid value:
Examples
ZDateNull=0
Range of Values
0 or 1. The default is 0.
Management Portal
On the page System Administration > Configuration > Additional Settings > Compatibility, in the ZDateNull row, select Edit. Choose true (selected) or false (cleared).