Using names like x0 in Blueprint Math Expression causes compiler error

Development Programming & Scripting
1

In versions up to 4.12 it worked fine to have a Blueprint Math Expression with the equation

x1-x0
producing two inputs x1 and x0.
In 4.13 Preview this causes the following compiler error:

Error PARSE ERROR in ’
K2Node_MathExpression_29 ': Unhandled
trailing ‘1-x0’ at the end of the
expression

2

Hello,

  • Could you provide a screenshot of the blueprint that is giving you this error?
  • Is this occurring in a clean project as well?
3

Yes, it also occurs in a new project. Just add a Math Expression and type in x0, it will cause a parse error.

4

Hello,

I have been able to reproduce this issue, and have entered a bug report, which you can track here: Unreal Engine Issues and Bug Tracker (UE-34378)

Thanks for your report.

Have a great day!