Stan Runtime Error Line Number

Simple question, but I can’t seem to find an answer on my own. I get a runtime error like this:

Chain 1: Exception: assign: Rows of left-hand-side (25) and rows of right-hand-side (19) must match in size (in ‘model22b17ee56514_892f6d2e227201e78655369fc13998ab’ at line 98)

How do I identify line 98 in my Stan code, which is defined as a character string in the R code?

version R version 4.0.3 (2020-10-10)
os Linux Mint 20
system x86_64, linux-gnu
ui RStudio
language en_US
RStan Version 2.21.2

Count from the top. Or save the Stan code as an external file so that you can open it in virtually any editor that either shows the line numbers or can jump to a specified line.