There seems to be a bug in LabVIEW formula functions.

I'm using a combination of "Parse Formula String.vi" and "Eval Parsed

Formula String.vi" to calculate user scripts(mathematical expressions)

runtime. It doesn't work even for a simple formula like "a=x+x;" which

contains a plural of the same variable x in an expression, although it

works in such a formula as "a=x^x;". This is very inconvenient and

strange. (I know that there exist some differences between

labview Formula Nodes and the Advanced Formula Functions.)