The Launch Spatial Model option may not run a spatial model.
The ERDAS IMAGINE session log will report:
ERROR: No empty ports in the given model
smguiprocess.exe exited with status 1.
The Launch Spatial Model option allows the user to run spatial models (.gmdx) from the ERDAS IMAGINE ribbon without using the Spatial Model Editor.
Toolbox tab > Spatial Model Editor menu > Launch Spatial Model
Requirements to run spatial models with Launch Spatial Model:
Model with Port Input operators example: