Added example of when this approach doesn't work

te3/powerbi-xmla-pbix-workaround.md

@@ -20,8 +20,7 @@ However, with the Power BI Project file, it's possible to create a .pbix file fr
 ![XLMA to PBIX Overview](~/images/power-bi/create-pbix-from-xmla-overview.png)
 
 > [!NOTE]
-> The described workaround isn't officially supported by Microsoft. There's no guarantee that it works for every model.
-
+> The described workaround isn't officially supported by Microsoft. There's no guarantee that it works for every model. Specifically, if you've added custom partitions or other objects [not listed here](https://learn.microsoft.com/en-us/power-bi/transform-model/desktop-external-tools#data-modeling-operations), Power BI Desktop may not be able to correctly open the file following this approach.
 
 ## Step 1: Create and save an empty Power BI projects (.pbip) file
 
@@ -35,7 +34,6 @@ This creates a folder structure that contains an empty _model_ file. This _model
 
 Close Power BI desktop, and proceed with the next step in Tabular Editor.
 
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 ## Step 2: Open XMLA model with Tabular Editor and save the model as .pbip
 
 With Tabular Editor open, connect to the Fabric workspace via the XMLA endpoint. Load the Power BI semantic model you want to convert to a .pbix.