These functions are part of the OpenMaple interface to Microsoft Visual Basic.

These functions raise the Maple error described by msg, equivalent to the Maple command error(msg,arg1,arg2);.

When an error is raised, the errorCallBack is invoked, and execution continues at the next statement. OpenMaple interrupts a computation at an error invoked by MapleRaiseError when the external function is launched via MapleTrapError.

The character string msg can contain wildcards of the form %N, where N is a non-zero integer. These wildcards are replaced by the extra argument, arg1 or arg2, before displaying the message. If %-N is specified, then the optional argument is displayed with the appropriate suffix, st, nd, rd, or th, appended. For example, consider the following command.

This, if invoked, raises the error, "the 4th argument, 'foo', is not valid", assuming i=4, and args(i) is set to the Maple name, foo. For more information, see error. The only option not allowed is %0 because the function cannot determine the number of unparsed optional arguments.