How to stop save drawing changes? Message while generating autocad drawing using VB.NET?

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VB

I have written few .NET codes to generate AutoCAD drawings based on various parameters entered by users on the UI. They are working well with older versions of AutoCAD till AutoCAD 2017.
I am facing following issues with AutoCAD 2023 version recently downloaded for trial.
1. I am getting frequent pop up message "Save changes in Drawing?"
2. After changing DIMSCALE using .NET the changed DIMSCALE can be seen on command prompt. But the Dimension text height does not change for all dimensions in the drawing.
Code line: objAutoCAD.SetVariable("DIMSCALE", Scalefactor) 'Controls Dimension Scale (Scalefactor is drawing scale)
Need some guidance.

Regards,
Prakash

What I have tried:

This code works well with earlier versions of AutoCAD. The issue is coming with AutoCAD 2023