I used a configuration right out of the documentation. This error is logged at startup. I have to remove all fields referenced in curly braces ${}

2023-03-31 13:45:13 ERROR Couldn't parse Exec block at C:\Program Files\nxlog\conf\nxlog.conf:60; couldn't parse statement at line 62, character 13 in C:\Program Files\nxlog\conf\nxlog.conf; invalid character: '$' (0x24) 

Config:

      # Convert integer type fields
      if (${Framed-MTU})          
          ${Framed-MTU} = integer(${Framed-MTU});