6/17/21: We have completed maintenance for the Search functionality on the Community. If you are seeing any issues, please try to clear your cache first. If the issue persists please email Community@alteryx.com

Alteryx Designer Knowledge Base

Definitive answers from Designer experts.

Error: Parse Error at char(0): Empty expression (Expression #n)


Environment Details

Error: Parse Error at char(0): Empty expression (Expression #n)
  • Alteryx Designer
    • All versions
  • Formula Tool
  • Multi-Row Formula Tool
  • Multi-Field Formula Tool


The tool is attempting to execute a missing or empty formula.


Breaking down the error message below in the Formula tool, Parse Error at char (0) tells you exactly where the issue is: remembering that Alteryx Designer is 0-based, the error occurs at the zeroth character, i.e. the very beginning of (Expression #1), which is empty in this case. 

The Multi-Row Formula tool also identifies the character position, and only uses one expression at a time, so it does not need to identify an expression number. 

To resolve, please enter a formula or function