Merge model builder does not preserve Field Map setting

[LucileFayolle]

ArcGIS 2.8.3

In my model builder I use the merge tool with the field map to reconciliate the fields of the two data source. Problem is: When I set the field map, validate by clicking ok and reopen the tool, if I click to change anything in the tool, the field map reset. Even if I change the output field name, the field map reset.

It look exactly like the bug that happened with the Append tool in 2019 (See post about it and esri answer)

I wonder if it is a common issue or it may be related to my model. I consider using the Append tool to replace this or even some Calculate field, but would rather keep the Merge.

Thank you

[EApolinar]

This is very interesting, however it does not seem to work for me. 

Im using the Field Map for the Append tool in a Model on ArcGIS Pro 3.1.0 and can't find a way for it to remember the Field Mapping. Everytime I close the tool/variable, it goes back to blanc. 

[RachelPinkston2]

I'm still on Pro 3.2.2, I have not upgraded to 3.4.x yet, so I'm not sure if this issue has been fixed in the more recent updates, but I wanted to share that ManP's solution above, worked for me.  Creating a field map variable retains the field mapping between sessions.  Thanks. 

[AFangman]

3.2.2 here. I have the same issue with the Merge not remembering my Field Map setup.

[CMorneau]

Hello to All.  Our team upgraded to Pro 3.4.3 on all our workstations about a month or so ago.  I tested my model that had the Merge tool Field Map issue, & it works fine now.  My settings persist from session to session, as they did once before.  I brought this issue to the attention of Esri's Shitij Mehta at the UC last year & she agreed that it sounded like a bug.  She said that she & her team would look into it.  I believe I saw somewhere that the bug was documented.  Bottom line - Esri appears to have fixed the issue.

Always great to connect with the right person at the UC & then see the issue ultimately get resolved after having that type of interaction.  Shitij is one of my Esri heroes & I always make it a point to tell her so.  Good for a few laughs, anyway.  Good luck with your models that have the Merge tool.  Please chime in if upgrading to Pro 3.4.3 resolved your issue.