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Upgrade to FME 2025 getting errors accessing temporary files during translation

  • June 2, 2025
  • 5 replies
  • 191 views
mgrimnes
Contributor
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I have a workspace that works without issues in FME 2024.2.1. We are planning to upgrade to FME 2025, but I am facing issues. When riunning the workspace in FME 2025, it seems to work fine, but after a while I get lots of a recurring message like this one:

2025-06-02 11:38:25| 119.2|  0.2|ERROR |FFS reader: Failed to open file 'D:\FMETemp\wbrun_1748852462857_30000\fmetmp_0\FMETable_1748853274266_18156\FTShim_1019.fts' for reading.  Please ensure that the file exists and you have sufficient privileges to read it

These messages DO NOT appear when running the workspace in FME Form/Flow 2024.2.1

I have tried FME Form/Flow 2025.0.2 and FME Form 2025.1 (beta) and all of these fails.

I have set my FME_TMP environment variable to D:\FMETemp

Does anyone have an idea?

      5 replies

      DanAtSafe
      Safer
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      • DanAtSafeSafer
      • Safer
      • June 2, 2025

      Hi ​@mgrimnes Do you get this error by stepping through transformers with feature caching enabled? Please submit a ticket here: https://support.safe.com/hc/en-us/p/Support

      mgrimnes
      Contributor
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      • mgrimnesContributor
      • Author
      • Contributor
      • June 3, 2025

      Hi ​@deanatsafe I don’t know, I haven’t tested. I will go ahead and run my workspace in Form 2025.1 with Feature Caching enabled and see what happens - if my PC is able to store all feature caches though. I will create a ticket for this after this test.

        itay
        Supporter
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        • itaySupporter
        • Supporter
        • December 2, 2025

        n

        gtimms
        Contributor
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        • gtimmsContributor
        • Contributor
        • March 3, 2026

        Hi ​@deanatsafe I don’t know, I haven’t tested. I will go ahead and run my workspace in Form 2025.1 with Feature Caching enabled and see what happens - if my PC is able to store all feature caches though. I will create a ticket for this after this test.

        Hi ​@mgrimnes, did you find a solution to this issue or did you end up creating a support ticket? 

        We have some users experiencing this so it would be good to know what you found out. One solution I found from a few years ago was copying the workspace into a new FME Form canvas, but that hasn’t been tested in our version of 2025 yet.

        Thanks!

        mgrimnes
        Contributor
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        • mgrimnesContributor
        • Author
        • Contributor
        • March 4, 2026

        No I didn’t find a solution for this. I got hooked up on another, more recent, project with the same customer.

        The idea of copying the workspace to a new canvas is likely a good first step. The workspace was last saved in FME 2024.2.1 and a custom transformer was last saved in 2023.1.1.1. The customer is planning for an upgrade to FME 2025.2.3, so this might be a good time to upgrade the workspaces and custom transformers to the new version by copy/paste and see what happens.

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