From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
Take a look at table 3-4 Order of Actions that a Step Performs in the Reference manual. The precondition is evaluated once and is evaluated before any loops are executed. I am not aware of any way to precondition any of the individual loops that are executed.
As Scott pointed out, you could not use the Loop Index in a
precondition. If you need that much control over your loops, I
would suggest using loop step type, either a For Loop or While
Loop. This would provide you complete control over the Loop index
and size for the loop.