The problem is not the passing of a parameter from one script to another it is the usage of relative pathes in scripts. The line:
. .dbParam.ini
is problematic because the validity of relative pathes (here "." or the current directory) is depending on what exactly "the current directory" represents. Try replacing the line with:
. /the/path/to/.dbParam.ini
and it will work regardless of where you right now are when you call the script.
Apparently you deleted the wrong point.
Try neatly deleting the point and slash just before the file name ./dbParam.ini ,
leaving only the first dot a space and then the file name . dbParam.ini
Save and exit. Run your script again and share the results please