added to_string for throwing size in argument
added to_string for throwing size in argument

jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun