Initialising a session variable from a parameter

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I'm initialising a session variable from a parameter Set|PageVariable|EventStatus|[param:DMAID/ElementID,2002,[this service]]|SetTrigger=ValueChanged which works fine if something is returned from the table, but all variables fail to initialise if there's no corresponding row in the table, how can I get round this?

Toon Casteele [SLC] [DevOps Enabler] Answered question 8th February 2024

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The documentation seems more limited on this than it should be, but have you tried adding "AllowEmptyDynamicValues" to your Options page data?

Toon Casteele [SLC] [DevOps Enabler] Answered question 8th February 2024
Philip Argent commented

Thanks Toon that worked