I have searched multiple forums and found question similar, but doesn't match my environments.
Problem: Cannot execute a package within a package
Error: To run a SSIS package outside of SQL Server Data Tools you must install st_Check_Files of Integration Services or higher.
SQL Server 2017 info
SSMS info
Versions inside Visual Studio 2017
Previously, I could not execute ANY packages with dtexec from command prompt, or execute any packages from within SQL Server Agent.
I uninstalled any remnants of SQL server as well as SSIS and SSDT and reinstalled 2017 versions of both and now I CAN execute via dtexec command prompt and SQL Server but cannot execute within Visual Studio SSDT (2017).
Any further insight?