Has anyone else had any issues with the SubstringExtractor in FME2025? I have a process that works in an older version (2021) but in the 2025 version I am seeing a different behavior.
Wanting the last 7 characters in a string I used a Start Index of -7 and an End Index of -1. This worked in FME 2021. When opening the workspace in FME 2025, it initially works, but when I upgrade the transformer from V2 to V3, it then returns no value. I created a new blank workspace and added a brand new SubstringExtractor in 2025 and saw the same result. It seems to work selecting values from the start like Start 4 End 7, or Start 2 End -1. But having the start be negative seems to always return no value. The change listed for the V2-V3 upgrade was adding bulk mode support.
Hoping I am just missing something/doing something wrong here.


Version is 2025.0.1.0
Attached is a version of the workspace with the transformer not upgraded, that way you can see the before and after by just upgrading it on your end if desired.
Thanks