This function tries to execute expr and returns a string with the
error message if the execution failed.
Value
Either the value of expr or in case of a failure an object of class
fail, which contains the error message.
Details
This function is a wrapper for try.
See also
Other function helpers:
do.call_timed(),
function_arguments(),
function_body(),
function_defaults(),
quiet(),
timed(),
variable_name()
