@Anonymous
I'm still fuzzy on a couple of points. I believe some would become clear seeing the formula on the Plus button.
In general though, I believe you might be looking at this a little overcomplicated.
Your formula, from what I am hearing so far, should be:
UpdateIf(CAR8D,
Title = "test1",
{D1_Team_Identification:
Concat(TeamIdentificationGallery.AllItems,
CItemSerialNumber_d1 & ";" & FullName_D1 & ";" & Role_D1 & "|"
)
}
)
If FullName_D1 and Role_D1 are text input controls, then it would be:
UpdateIf(CAR8D,
Title = "test1",
{D1_Team_Identification:
Concat(TeamIdentificationGallery.AllItems,
CItemSerialNumber_d1 & ";" & FullName_D1.Text & ";" & Role_D1.Text & "|"
)
}
)
Serial number seems to be a TextInput from your pictures, and I'm not entirely sure how this even fits into anything.
Now, some confusion on my part mounts with the fact that originally you showed "D1_Team_Identification" as the column you were trying to update, but now you mention "Repeating_Data_Card" as the column. Am I missing something there?