NPOI Lab
OYSTER, since it runs under IDL, almost never crashes to the OS prompt. What
usually happens that if an error occurs in a script, execution stops at the
offending line of code. At this point a programmer can check the status of
variables to find the cause of the problem. If this happens to you, just
use retall to jump to the main level. Then notify the author of the
problem. You can resume operations from there.