Hi,

Thanks everyone for your help.

I think Bob Phillips may be right.

if the macro to run were in the same file as the macro calling it, the
following would work:

STRING = "'MACRO_WITHOUT_FILEPATH, "ARGUMENT 1", ETC '"

Run STRING

if the macro to run were in another file but had no arguments the
following works:

STRING = "FILE.xls!MACRO"

Run STRING

But no variations of these seem to work for the case of a macro taking
arguments, and located in another file

Thanks again.

Ian