This Error is coming while adding Validations to the date and time in Maintenance Information
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The 3rd param of If() function should be enclosed in the quotes like "Please enter a date and time in future".
Do you think it adds value to repeat the answer a fifth time?
(I had to bite my tongue (figuratively) a few weeks ago to keep myself from submitting a new comment along the lines of, "since nobody seems to have mentioned it so far, you should add quotes...")
You made my day Mike !
This is one of my favorite threads, haha! I've been biting my tongue in other threads, where getting necessary details is unnecessarily hard, to just start adding "Use quotes in line 3" :)