For example?
{=if (pathtype(source) != "shell") {return "dopusrt /argsmsgbox Hello; dopusrt /argsmsgbox Hi"}=}
What is the context that this Evaluator code is being used in?
It's a button.
Buttons can't run more than one command per line, and the Evaluator is just producing lies in that context.
But you can do it like this:
{=if (pathtype(source) != "shell") {return "dopusrt /argsmsgbox Hello"}=}
{=if (pathtype(source) != "shell") {return "dopusrt /argsmsgbox Hi"}=}
(You could also store the condition in a variable to avoid repeating it on each line, if it's a complex test or there are lots of lines. Not really needed here though.)
OK 