[SIC\]SIC SYSTEM [ERROR|NOERROR]
Indicate if the commands SIC\SYSTEM, SIC\SIC COPY, and SIC\SIC APPEND
can raise errors or not, i.e. if any error occuring when executing the
string command (SIC\SYSTEM), or occuring when copying/appending a file
should stop the Sic execution flow. Default is true. The current status
is also available in the logical variable SIC%SYSTEMERROR.