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CC_132445408-Gravel
8-Gravel
June 1, 2026
Question

Mashup Functions Not Storing Changes

  • June 1, 2026
  • 2 replies
  • 48 views

Mashup Expression and Validator functions are not reliably storing changes to code as of Friday 5/29

I open the function, make some change to the code within, click Done button to close the function editor, and when I reopen the editor whatever change I made has disappeared, reverting back to the previous value. 

This includes a brand new function created to test this bug. A new expression or validator created with 

Output = "test"

will be simply a blank window after closing and reopening.

I first discovered this on Friday 5/29 and again today and have tested and found the same bug in both Firefox and Chrome with the latest versions of both. Clearing browser cache and restarting had no effect. Closing all active edits in Thingworx composer and returning had no effect.

This also occurs in a new, blank mashup as well as existing complex mashups. 

2 replies

N
nmutter16-Pearl
16-Pearl
June 1, 2026

Works for me (TWX10.1 with firefox).

From what you are describing it must be a frontendside issue (as changing expression will not call a backend service). 

The only thing coming to mind is that you may have imported an extension on thursday/friday, containing a widget? which might cause the frontendcode to be broken in some way?

Questions:

  • Was there any new extension imported?
  • Could you open Browser DevTools (F12) and see if it logs any error when opening mashup builder and/or editing an expression
    C
    CC_132445408-GravelAuthor
    8-Gravel
    June 3, 2026

    Thanks for responding, its not consistent and I haven’t seen it happen since shortly after I made that post.

    There were no new extensions added recently prior to the first time this occurred. 
    I did check the browser tools and there were some errors showing but nothing I could identify as the culprit and I couldn’t spare the time to really get into it.

    I’ll revisit this if it returns in the future

    V
    VladimirRosu_11662719-Tanzanite
    19-Tanzanite
    June 3, 2026

    I can confirm I observed this in ThingWorx 10.0.0, exactly in the same irregular way. It was an issue for us for 2 days, not being able to edit the Expressions, but after that it vanished when using the same mashup and it never happened since that time. I have no clue what triggered this.

      A
      abandalCommunity Manager
      Support
      June 11, 2026

      Hello ​@CC_13244540,

      I hope you are doing well!

      I tested this scenario internally for ThingWorx 10.0.0 and did not observe the issue on the latest versions of both Microsoft Edge and Google Chrome.

      If you encounter this issue again, please let the community know on this same post along with any additional details (such as ThingWorx version, exact steps to reproduce (if the issue is consistently reproducible) or screen recordings ). This will help our community to investigate further.

       

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