The writex statement writes the item specified in dyn.array.var into the specified file, using the item-ID specified in the ID.exp. The writex statement will wait until the actual disk update takes place before continuing execution of the program. This is used for "critical" write-through, such as error-logging.
writex dyn.array.var on {file.var,} ID.exp{onerr.clause}
| dyn.array.var | Item to write to the specified file. |
| file.var | File onto which the dynamic array variable is written. If not specified, the default file variable is used. |
| ID.exp | Item-ID to assign to the new item being added to the file. |
| onerr.clause | An optional onerr.clause can be specified, which consists of the clause onerr followed by a statement block. The clause is taken if the update fails because the data source is unavailable (as can be the case if the file is remote), or if a callx correlative applied to the file fails because of an inputerr statement. |