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CC_132445408-Gravel
8-Gravel
June 1, 2026
Question

Mashup Functions Not Storing Changes

  • June 1, 2026
  • 1 reply
  • 32 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. 

1 reply

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
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