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an error action.
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an error action.
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\code{geterrmessage} gives the last error message.
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\code{geterrmessage} gives the last error message.
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}
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}
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\details{
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\details{
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- |
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The error action is controlled by error handlers established within
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The error action is controlled by error handlers established within
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the executing code and by the current default error handler set by
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the executing code and by the current default error handler set by
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\code{options(error=)}. The error is first signaled as if using
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\code{options(error=)}. The error is first signaled as if using
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\code{signalCondition}. If there are no handlers or if all handlers
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\code{\link{signalCondition}()}. If there are no handlers or if all handlers
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return, then the error message is printed (if
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return, then the error message is printed (if
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\code{options("show.error.messages")} is true) and the default error
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\code{options("show.error.messages")} is true) and the default error
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handler is used. The default behaviour (the \code{NULL}
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handler is used. The default behaviour (the \code{NULL}
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error-handler) in interactive use is to return to the top level
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error-handler) in interactive use is to return to the top level
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prompt or the top level browser, and in non-interactive use to
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prompt or the top level browser, and in non-interactive use to
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(effectively) call \code{\link{q}("no", status=1, runLast=FALSE}).
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(effectively) call \code{\link{q}("no", status=1, runLast=FALSE}).
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The default handler stores the error message in a buffer; it can be
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The default handler stores the error message in a buffer; it can be
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retrieved by \code{geterrmessage}. It also stores a trace of the
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retrieved by \code{geterrmessage()}. It also stores a trace of
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call stack that can be retrieved by code{traceback}.
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the call stack that can be retrieved by \code{\link{traceback}()}.
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Errors will be truncated to \code{getOption("warning.length")}
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Errors will be truncated to \code{getOption("warning.length")}
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characters, default 1000.
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characters, default 1000.
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}
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}
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\value{
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\value{
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