Some errors are fatal and prevent the script from running at all.
The most common are specifying a nonexistent script (i.e. an incorrect
URL), or fatal compile errors. These errors can be captured by an
ErrorScript specified in the
texis.ini file. See
here for details.
Note that a few severe errors, such as stack overflow, can occur
after the script starts (so ErrorScript does not apply),
yet cannot be captured by
<putmsg> at all, because the script
cannot continue execution to call