In some situations, especially when returning from Database Development perspective back to Teiid Designer perspective after executing a VDB, the Import From Flat File Source wizard will fail when selecting the target model location. Even after selecting a model project, the wizard says "Source model file location must be selected. Choose '...' button and select existing project or folder", and cannot be advanced further. See Steps to reproduce for details.

The issue disappears after clicking on a model project in the Model Explorer.

It appears that the wizard tries to use the selected project, but there is none in some situations.

The issue seems to be limited to Flat File import wizard.


Steps to reproduce:
These steps must be followed exactly. There are other situations when this issue occurs, but these are the only steps I was able to find to reliably reproduce.
# open JBDS with clean workspace
# open Teiid Designer perspective
# create new model project
# create a new empty VDB in the project
# expand the project in the Model Explorer, double click the VDB, do *not* click on the project
# select Window -> Open Perspective -> Other -> Database Development
# switch back to Teiid Designer perspective, do *not* click on the project
# switch to Outline
# select File -> Import -> File Source (Flat) 
# Next, Next
# click New, define any flat file datasource, Finish
# under Source Model Definition, the Name is now prefilled, Location is empty
# Click "..." next to Location, select the model project, OK
# notice the wizard still says "Source model file location must be selected. Choose '...' button and select existing project or folder"