# Problem detected when migrating subflows between machines

**URL:** <https://discourse.nodered.org/t/problem-detected-when-migrating-subflows-between-machines/97495>\
**Category:** General\
**Created:** [8 June 2025 22:16 UTC](https://discourse.nodered.org/t/problem-detected-when-migrating-subflows-between-machines/97495 "2025-06-08T22:16:28Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [8 June 2025 22:16 UTC](https://discourse.nodered.org/t/problem-detected-when-migrating-subflows-between-machines/97495/1 "2025-06-08T22:16:28Z")

</div>

Yes, how I am doing it may be making my own life miserable, but it's the only way I know.

Details - as best I can give:  
EXPORTING FROM: NR 4.0.9  
IMPORTING TO: NR 3.0.2 and 4.0.9

I would import it, REPLACE the node, and do a bit of fixing up of other stuff.

ALSO: The subflow had been severely altered in that how many outputs there are/were.  
Reduced.

Re-wire it and DEPLOY.

Things weren't working.

I'd inject messages and NOTHING happened.  
After a few attempts, I would open the subflow and look at it's internals.

Half/all/most of the wires were missing.

Now, I'm not sure if I also re-exported it or just imported it again.

All wires intact.

WEIRD.

Just to put it out there.

---

_[View the full topic](https://discourse.nodered.org/t/problem-detected-when-migrating-subflows-between-machines/97495)._