N002 Error Processing for MATHLIB

Subroutine MTLSET allows the user to redefine the action to be taken by certain subprograms in MATHLIB when certain specified error conditions are detected. Error recovery may be performed either on each occurrence of the error, or only a specified number of times. Messages may be written either on each occurrence of the error, or only a specified number of times. Error messages may be written (by default) onto the system output unit, or may be re-routed to some other output file.

Structure:

SUBROUTINE subprogram
User Entry Names: MTLSET
Internal Entry Names: MTLMTR
Files Referenced: Printer or user-defined
External References: ABEND (Z035)

Usage:

    CALL MTLSET(ER,LGFILE,LM,LR)

ER

( CHARACTER*6) A character string that identifies the range of error conditions for which action is to be redefined.

LGFILE

( INTEGER) The logical unit number to be used for error messages, or zero if error messages are to be written onto the system output unit.

LM

( INTEGER) The number of occurrences of each error condition in the range ER for which an error message is to be written. is ignored, $LM\; \ge 255$ is treated as infinity.

LR

( INTEGER) The number of times that error recovery is to be performed for each error condition in the range ER. is ignored, $LR\; \ge 255$ is treated as infinity. If any error condition in the range ER occurs $LR+1$ times a message is printed and the run is terminated by calling ABEND (Z035).

Notes:

1. MTLSET applies to those MATHLIB error conditions which are specified by a six-character code (e.g. C204.2) in the Error handling section of the Short Write-ups.
2. If the string ER consists of six characters specifying a single error condition
   (e.g., ER= 'C204.2'), LM and LR apply only to this one error condition.

   If the six-character string ER ends with one or more blanks, LM and LR apply to all error conditions whose leftmost characters match the non-blank characters of ER.
   Thus ER = 'C2 ' (four blanks) applies to all error conditions in packages C200 to C299, and ER = ' ' (six blanks) applies to all error conditions under the control of MTLSET.

3. The value of LGFILE applies to all error messages written under the control of MTLSET.

N100