I cannot step through source c code, only disassembly. This only applies to custom source, such as main, that appear not in the SDK file folder but the code that resides in the same relative file folder as with all the examples, that is, 3 levels below the project folder. In options all the path names are provided to the relevant SDK folders, but also to the custom source folder (ie, ../../../). When i set a breakpoint in main() for example, the code breaks at the breakpoint but then if I "step into" it always goes to the disassembly window. Using SES.