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Question

Workbench crashes when update to later version

  • April 21, 2026
  • 3 replies
  • 55 views
emmylm
Participant

I’ve several fme-worbench created in vers. 2023.2. When I update FME to later versions such as, 2025.2.4 or 2026.1 this warning below pops-up and the run crashes mor or less.

“Running (.fme) Mapping Files is deprecated. Please see http://fme.ly/fmeMappingFileDeprecation for more information”

Any ideas why and what I can do?
 

      3 replies

      david_r
      Celebrity
      • david_rCelebrity
      • April 21, 2026

      What are the file extensions? *.fmw or *.fme?

      gabriel_hirsch
      Contributor
      Forum|alt.badge.img+14

      Are you running old hand-written mapping files with the .fme extension?

      DanAtSafe
      Safer
      Forum|alt.badge.img+23
      • DanAtSafeSafer
      • Safer
      • April 21, 2026

      Hi ​@emmylm  That should be just a warning if you’re running a mapping files (*.fme) from the command line, but the warning can also appear if a sub-process is run (which shouldn’t happen - FMEFLOW-26222)

      Either way, it shouldn’t cause FME 2025.2.4 or 2026.1 to crash. Please submit a ticket.

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