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errcatch Scilab Group Scilab Function errcatch
NAME
errcatch - error trapping
CALLING SEQUENCE
errcatch(n [,'action'] [,'option'])
PARAMETERS
n : integer
action, option : strings
DESCRIPTION
errcatch gives an "action" (error-handler) to be performed when an
error of type n occurs. n has the following meaning:
if n>0, n is the error number to trap
if n<0 all errors are to be trapped
action is one of the following character strings:
"pause" : a pause is executed when trapping the error. This option
is useful for debugging purposes. Use whereami() to get
informations on the current context.
"continue" : next instruction in the function or exec files is
executed, current instruction is ignored. It is possible to
check if an error has occured using the iserror function. Do
not forget to clear the error using the errclear function as
soon as possible This option is useful for error recovery.
In many cases, usage of errcatch(n,"continue",..) can be
replaced by the use of execstr function.
"kill" : default mode, all intermediate functions are killed,
scilab goes back to the level 0 prompt.
"stop" : interrupts the current Scilab session (useful when Scilab
is called from an external program).
option is the character string 'nomessage' for killing error message.
To set back default mode, enter errcatch(-1,"kill") or similarly
errcatch(-1).
Then called in a scilab function the errcatch is automatically reset to
the default mode when the function returns.
SEE ALSO
errclear, iserror, whereami, execstr
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