ERROR: Execute On Error


\begin{command} \item[\textbf{Form: } ERROR VISTA\_command\hfill]{} \item[VISTA\_command]{is any valid VISTA command.} \end{command}
ERROR tells VISTA to execute the given VISTA command whenever an execution error occurs. The command can be any VISTA command but is quite often a GOTO command. VISTA_command can not contain multiple commands separated by semicolons. 

  1.   ERROR GOTO WHEREVER
  Any number of procedure lines...
  WHEREVER:
  The next commands to be executed after an error...

  2.   ERROR ERRFLAG=1
  Sets the VISTA variable ERRFLAG to 1 upon an error.