I was having trouble with a custom function. Discovered that you can not pass a value from a repeated field to a custom function.

I had to set a non-repeated field value to the value I wanted to pass and then use it as the custom function parameter.

Is this a bug in FM? Seems you shouldn't have to go to through the extra step of 'set field' to use a custom function

What does your CF look like?

This is due to the fact that the entire repeating field can be passed. I suspect some other operation would disassociate it.

So,

  CF( A[2] & ""; A[3] + 0 ),

depending on your data type.

Huh? AFAIK, if you reference a repeating field as a parameter, only the first repetition is passed. I don't know of any bug.

I didn't say there was a bug, just that the repeating fields are passed to the custom function as a field, not just the value.

Here's an example file, notice the MyValueRep() custom function, which pulls data from a repetition other than the first, showing the data for the other repetitions is available inside the custom function.

repeats.fp7.zip

Yes, I am aware of this perplexing duality of the parameter (my test file is nearly identical to yours). Still, that works only with repeating and aggregate functions (I think), so I didn't consider it relevant in the context of "can not pass a value from a repeated field to a custom function". If anything, it shows that on the contrary - you can pass several values from a repeating field to a custom function. I am still curious what led the OP to such sweeping conclusion.