I have a prepare formula, if FrameSize from the primary source is blank, use frame size from the other source. It works, unless both the primary and secondary source are '7F', in that case it changes to '7.0'. Can anyone see why?
If your data needs to be treated as a string in the formula, you can use strval("myColumnName"). Alternatively, if you want numeric, use numval("myColumnName"). Otherwise, your data type will be inferred, so 7F is inferred to a double 7.0.
Hope it helps,
Could you please try again the previous solution, but this time with quotes "" inside strval:
if(isBlank(AT_FrameSize), strval("VP_FrameSize"), strval("AT_FrameSize"))
This will ensure it works for all values, not only 7F but any character values.