[Zax]

Originally Posted by Fizzlemizz or are you saying you want to test if RunScript(strLine) is going to run without error before running RunScript(strLine)?

Yes

If I write RunScript("mmmkkhgrttt") I will have a lua error, and I would like to trap this error.
In fact, I'm now able to do this with something like:

local func, errorMessage = loadstring(strLine)
            if (not func) then
                isError = true
            else
                local success, errorMessage = pcall(func)
                if (not success) then
                    isError = true
                end
            end

The tricky part is to catch errors when a macro is passed to the function .executeCmd() and processed with:

if (isMacroBoolean)) then
                --------------------------- macro ("/" needed)
                if (string.sub(strLine, 1, 1) ~= "/") then strLine = "/"..strLine end
                DEFAULT_CHAT_FRAME.editBox:SetText(strLine)
                ChatEdit_SendText(DEFAULT_CHAT_FRAME.editBox, 0)
            else
                ...
            end

In case of macro passed as strLine, I don't know how to test/try strLine.