Basic Characteristics RAPID

RETRY Restarts following an error
Example
RETRY is used to restart program execution after an error has occurred.
reg2 := reg3/reg4;
.
ERROR
IF ERRNO = ERR_DIVZERO THEN
reg4 := 1;
RETRY;
ENDIF
Program execution
Error handling
Limitations
Syntax
An attempt is made to divide reg3 by reg4. If reg4 is equal to 0 (division by zero),
a jump is made to the error handler, which initialises reg4. The RETRY instruction
is then used to jump from the error handler and another attempt is made to
complete the division.
Program execution continues with (re-executes) the instruction that caused the error.
If the maximum number of retries (5) is exceeded, the system variable ERRNO is set
to ERR_EXCRTYMAX (see "Data types - errnum"). This error can be handled in the
error handler.
The instruction can only exist in a routine’s error handler. If the error was created using
a RAISE instruction, program execution cannot be restarted with a RETRY instruction,
then the instruction TRYNEXT should be used.
RETRY ’;’
RAPID Reference Manual 8-RETRY-1