Traceing in Delphi

[petrsoft]

Hello, I have difficulties with tracing my source code in Delphi. Every time I want to trace  compiler stops not on demanding line but somewhere on other place in source code, very often on blank line. It is very unpleasant and makes me sometimes confusion .This happens after using units which are parts of original package Intraweb. I have Delphi 10.2 and now  and Intraweb 15.1.17 Ultimate Edition. Maybe is problem to have both installation as like as for Delphi XE and Delphi Tokyo on my computer ?
Thank you very much
Jaroslav , petrsoft