Specifies the name of the macro to replay. If the name does not include the file extension .iim, the macro has to lie in the macros folder of your iMacros installation, e.g. C:\Users\Me\Documents\iMacros\Macros. Otherwise, you have to give the macro's full path, which can have spaces, but in this case requires to be enclosed in double quotes, or replaced by [SP].
Valid macro name or full path
imacros.exe -macro test1
will replay the test1.iim file in the macros folder.
imacros.exe -macro "c:\Users\Public\Documents\Performance\Test Entry.iim"