I have three laptops one old using ver 8.9, one not as old using ver 9.4 and one 2 days old also using ver 9.4. The old one will use breakpoints just fine the others always ignore any breakpoint(s). I copied the working copy using a SD drive to the other laptops still have the breakpoint issue. I tried a 8.9 beta version on one of newer laptops - breakpoints still do not work. I cleaned the project - same problem. On the newest laptop the breakpoints worked for a bit they have not worked since. The breakpoints work in B4A for what it is worth. This is very frustrating - Any thoughts appreciated.