What is the purpose of the Logger transformer in FME workflows?

• A. To trap errors and log messages
• B. To filter data
• C. To merge datasets
• D. To reproject coordinates

Answer: (A)

The Logger transformer is all about recording what happens as a workspace runs. It writes messages to the FME log (or an external file), including errors, warnings, and informational notes, so you can see exactly what occurred during processing. This makes debugging and monitoring much easier because you get context about where something went wrong, which feature was involved, and what values were in play. It doesn’t change the data stream—no filtering, merging, or coordinate changes happen here. Instead, it provides visibility and traceability, and you can tailor the log level and details to focus on the issues you care about.