unable to reuse design partition in quartus 19.3 version.

hi

Its not the error. Instead the .qdb file is not getting connected if seen in the rtl viewer.

Here are the steps which I followed.

1. Create a project add all the rtl files. Run analysis and synthesis once.
2. In the hieracrchy tab the module which I need to create a partition, right click it go to design partition, select default.
3. Run synthesis again, once done. Go to projects > export design partion> export the synthesised snapshot of the module.

To resue:

1. create a project with top file and the resuse module stub file.
2. run synthesis once.
3. follow the step no. 2 above to set the module to default.
4. int he desin partion window add the .qdb file and run the synthesis again

these steps I followed for Quartus 18. which was perfectly reusign the design. But here seems some issue with the .qdb file.

Added scrrenshots.

I have double checked there is no issue with the stub file, I am using all signals are same. I also tried running the whole flow till fitter but the results are same. As you can see once I add the qdb file. It is not getting connected to the design.