Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in
 

 

Rexx Program is executing infinite loop: Chunk of records

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CLIST & REXX
View previous topic :: :: View next topic  
Author Message
Logeswaran Audhikesavan

New User


Joined: 26 Mar 2013
Posts: 5
Location: INDIA

PostPosted: Tue Apr 23, 2013 5:06 pm    Post subject: Rexx Program is executing infinite loop: Chunk of records
Reply with quote

Hi Team - Greetings!
I have a scenario where I need to read a records from file using chunk logic.. I gone through many discussions through this forum and learnt on that. I also tried and created the program but my program is executing infinite loop.. Unable to stop unless I disconnect from mainframe.

Here is the program , It would be great if you could let me know where I am making mistake. Sorry this is my first prg in Rexx..

Trying to read 100 records once and do processing and read another 100 records..
Code:

DO FOREVER UNTIL(EOF)                                         
  "EXECIO 100 DISKR INFILE (STEM TST. FINIS"                   
  IF RC <> 0 THEN EOF = 1                                     
  CNT = CNT + TST.0                                           
  DO I = 1 TO TST.0                                           
     IF INDEX(TST.I,'ENDED AT HALINMA1  MAXCC=',1) > 0 THEN DO
        SAY 'AM INSIDE THE LOOP'                               
        k1=jobnm.0 + 1                                         
        FIN = JOBNM.0 + 1                                     
        JOBNM.k1 = SUBSTR(TST.I,90,8)                         
        RC1      = SUBSTR(TST.I,124,4)                         
     END                                                       
  END                                                         
END   


Result am getting is that -> "Am inside the loop" which is being displayed infinitely.. Where as my input file has just 300 records.

thank you So much for your assistance in advance.
Back to top
View user's profile Send private message

expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Tue Apr 23, 2013 5:29 pm    Post subject:
Reply with quote

Have you used TRACE

Also, please learn how to use the code tags. I have done it for you this time.
Back to top
View user's profile Send private message
enrico-sorichetti

Global Moderator


Joined: 14 Mar 2007
Posts: 10202
Location: italy

PostPosted: Tue Apr 23, 2013 5:44 pm    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

elementary Dr. Watson

Quote:
EXECIO .... ( FINIS

will close the file, and You will be processing over and over the same chunk.

this is the proper way of doing it

Code:
 ****** ***************************** Top of Data ******************************
 000001 /* rexx */
 000002 trace "o"
 000003 signal on novalue name novalue
 000004 parse arg chunk
 000005
 000006 Address TSO
 000007
 000008 "ALLOC FI(F1) DS('ENRICO.TEST.PS1') SHR REUS "
 000009
 000010 iters = 0
 000011 count = 0
 000012 do  forever
 000013     "EXECIO "chunk"  DISKR F1 (STEM STEM. "
 000014     iters = iters + 1
 000015     count = count + stem.0
 000016     if stem.0 < chunk then ,
 000017         leave
 000018 end
 000019 "EXECIO 0 DISKR F1 (FINIS "
 000020 "FREE  FI(F1) "
 000021
 000022 say count chunk iters
 000023
 000024 exit
 000025 novalue:
 000026 say  "*********************************"
 000027 say  "**                             **"
 000028 say  "** novalue trapped at line" || right(sigl,4) || " **"
 000029 say  "**                             **"
 000030 say  "*********************************"
 000031 exit
 ****** **************************** Bottom of Data ****************************
Back to top
View user's profile Send private message
enrico-sorichetti

Global Moderator


Joined: 14 Mar 2007
Posts: 10202
Location: italy

PostPosted: Tue Apr 23, 2013 6:07 pm    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

but this one is better....
it handles a proper END OF FILE ( RC 2 ) vs an ERROR

Code:

 ****** ***************************** Top of Data ******************************
 000001 /* rexx */
 000002 trace "o"
 000003 signal on novalue name novalue
 000004 parse arg chunk
 000005
 000006 Address TSO
 000007
 000008 "ALLOC FI(F1) DS('ENRICO.TEST.PS1') SHR REUS "
 000009
 000010 iters = 0
 000011 count = 0
 000012 do  forever
 000013     "EXECIO "chunk"  DISKR F1 (STEM STEM. "
 000014     if  RC  > 2 then ,
 000015         signal error
 000016     iters = iters + 1
 000017     count = count + stem.0
 000018     if  RC  = 2 then ,
 000019         leave
 000020 end
 000021 "EXECIO 0 DISKR F1 (FINIS "
 000022 "FREE  FI(F1) "
 000023
 000024 say count chunk iters
 000025
 000026 exit
 000027
 000028 error:
 000029 say "EXECIO error :" RC
 000030 say "EXECIO error :" count chunk iters
 000031 exit
 000032 novalue:
 000033 say  "*********************************"
 000034 say  "**                             **"
 000035 say  "** novalue trapped at line" || right(sigl,4) || " **"
 000036 say  "**                             **"
 000037 say  "*********************************"
 000038 exit
 ****** **************************** Bottom of Data ****************************
Back to top
View user's profile Send private message
Logeswaran Audhikesavan

New User


Joined: 26 Mar 2013
Posts: 5
Location: INDIA

PostPosted: Tue Apr 23, 2013 7:37 pm    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

Thanks for your valuable suggestions!! WIll surely ensure to use Code tag going fwd.. Also I tried the Trace and it worked fine

Now its reading the value as expected, now am facing issue while writing the identified data into output flat file..

It tripping an error signal at line no 18 which is actualy at allocation of file. I doubt that, when data is being read each time(100) for each occurences, it has something identified and those has to be written in created file.

Can you please help here.

My updated code is

Code:

000001 /* rexx */                                                 
000002 dsname = 'XXXxxx.T.REX.TEST5'                               
000003 DSE = SYSDSN("'"strip(dsname)"'")                           
000004 ADDRESS TSO                                                 
000005 IF DSE = 'OK' THEN                                         
000006 DO                                                         
000007 "DELETE ('"dsname"')"                                       
000008 END                                                         
000009                                                             
000010 trace "o"                                                   
000011 signal on novalue name novalue                             
000012 parse arg chunk                                             
000013                                                             
000014 Address TSO                                                 
000015                                                             
000016 "ALLOC FI(F1) DS('XXXXXX.LOG.D130408') SHR REUS "           
000017                                                             
000018 "ALLOC DA('"XXXXXX.T.REX.TEST5"') F(OUTFILE)               
000019  DSORG(PS) SPACE(1,1) TRACK LRECL(80) RECFM(F,B) MOD"       
000020                                                             
000021 JOBNM.=' '                                                 
000022 jobnm.0=0                                                   
000023 iters = 0                                                   
000024 count = 0                                                   
000025 do  forever                                                 
000026     "EXECIO 100 DISKR F1 (STEM STEM. "                           
000027     if  RC  > 2 then ,                                           
000028         signal error                                             
000029     iters = iters + 1                                           
000030     SAY 'AM IN' STEM.0                                           
000031     count = count + stem.0                                       
000032                                                                 
000033     DO I = 1 TO STEM.0                                           
000034        IF INDEX(STEM.I,'ENDED AT HALINMA1  MAXCC=',1) > 0 THEN DO
000035           SAY 'AM INSIDE THE LOOP'                               
000036           K1       = jobnm.0 + 1                                 
000037           JOBNM.k1 = SUBSTR(STEM.I,90,8)                         
000038           SAY 'JOBNAME IS ' JOBNM.K1                             
000039           ADDRESS TSO "EXECIO * DISKW OUTFILE (STEM JOBNM."     
000040        END                                                       
000041                                                                 
000042     END                                                         
000043                                                                 
000044     if  RC  = 2 then ,                                           
000045         leave                                                   
000046 end                                                             
000047 "EXECIO 0 DISKR F1 (FINIS "                                     
000048 "FREE  FI(F1) "                                                 
000049                                                                 
000050 "EXECIO 0 DISKW OUTFILE (FINIS "                                 
000051 "FREE  FI(OUTFILE) "                                         
000052                                                               
000053 say count iters                                               
000054                                                               
000055 exit                                                         
000056                                                               
000057 error:                                                       
000058 say "EXECIO error :" RC                                       
000059 say "EXECIO error :" count iters                             
000060 exit                                                         
000061 novalue:                                                     
000062 say  "*********************************"                     
000063 say  "**                             **"                     
000064 say  "** novalue trapped at line" || right(sigl,4) || " **"   
000065 say  "**                             **"                     
000066 say  "*********************************"                     
000067 exit                                                         


Again thank you so much for your suggestions!, I could able to step forward 50%..
Back to top
View user's profile Send private message
Logeswaran Audhikesavan

New User


Joined: 26 Mar 2013
Posts: 5
Location: INDIA

PostPosted: Tue Apr 23, 2013 8:12 pm    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

Thank you All - It worked I made small changes at file creation step..

This is simply great!!!

Code:
000001 /* rexx */                                             
000002 dsname = 'XXXXX.T.REX.TEST5'                           
000003 DSE = SYSDSN("'"strip(dsname)"'")                       
000004 ADDRESS TSO                                             
000005 IF DSE = 'OK' THEN                                     
000006 DO                                                     
000007 "DELETE ('"dsname"')"                                   
000008 END                                                     
000009                                                         
000010 trace "o"                                               
000011 signal on novalue name novalue                         
000012 parse arg chunk                                         
000013                                                         
000014 Address TSO                                             
000015                                                         
000016 "ALLOC FI(F1) DS('XXXX.LOG.XXXXX8') SHR REUS "       
000017                                                         
000018 "ALLOC DA('"DSNAME"') FI(OUTFILE)                       
000019   DSORG(PS) SPACE(1,1) TRACK LRECL(80) RECFM(F,B) MOD" 
000020                                                         
000021 JOBNM.=' '                                             
000022 jobnm.0=0                                               
000023 iters = 0                                               
000024 count = 0                                               
000025 do  forever                                             
000026     "EXECIO 100 DISKR F1 (STEM STEM. "                 
000027     if  RC  > 2 then ,                                           
000028         signal error                                             
000029     iters = iters + 1                                             
000030     SAY 'AM IN' STEM.0                                           
000031     count = count + stem.0                                       
000032                                                                   
000033     DO I = 1 TO STEM.0                                           
000034        IF INDEX(STEM.I,'ENDED AT HALINMA1  MAXCC=',1) > 0 THEN DO
000035           SAY 'AM INSIDE THE LOOP'                               
000036           K1       = jobnm.0 + 1                                 
000037           JOBNM.k1 = SUBSTR(STEM.I,90,8)                         
000038           SAY 'JOBNAME IS ' JOBNM.K1                             
000039           ADDRESS TSO "EXECIO" K1 " DISKW OUTFILE (STEM JOBNM."   
000040        END                                                       
000041                                                                   
000042     END                                                           
000043                                                                   
000044     if  RC  = 2 then ,                                           
000045         leave                                                     
000046 end                                                               
000047 "EXECIO 0 DISKR F1 (FINIS "                                       
000048 "FREE  FI(F1) "                                                   
000049                                                                   
000050                                                                   
000051 "EXECIO 0 DISKW OUTFILE (FINIS "                                 
000052 "FREE  FI(OUTFILE) "                                             
000053                                                             
000054 say count iters                                             
000055                                                             
000056 exit                                                       
000057                                                             
000058 error:                                                     
000059 say "EXECIO error :" RC                                     
000060 say "EXECIO error :" count iters                           
000061 exit                                                       
000062 novalue:                                                   
000063 say  "*********************************"                   
000064 say  "**                             **"                   
000065 say  "** novalue trapped at line" || right(sigl,4) || " **"
000066 say  "**                             **"                   
000067 say  "*********************************"                   
000068 exit
Back to top
View user's profile Send private message
Pedro

Senior Member


Joined: 01 Sep 2006
Posts: 2019
Location: Silicon Valley

PostPosted: Tue Apr 23, 2013 9:03 pm    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

?? I would expect a continuation error at lines 18 to 19.
Back to top
View user's profile Send private message
Logeswaran Audhikesavan

New User


Joined: 26 Mar 2013
Posts: 5
Location: INDIA

PostPosted: Wed Apr 24, 2013 10:12 am    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

Hi Pedro - Recent code which I posted is working perfectly..

if I use " quotes in 18th line to end that, then its giving error. To make this continued I ensured the quotes has been closed in 19th line.

Code:
000018 "ALLOC DA('"DSNAME"') FI(OUTFILE)                       
000019   DSORG(PS) SPACE(1,1) TRACK LRECL(80) RECFM(F,B) MOD"
Back to top
View user's profile Send private message
Akatsukami

Global Moderator


Joined: 03 Oct 2009
Posts: 1738
Location: Bloomington, IL

PostPosted: Wed Apr 24, 2013 6:22 pm    Post subject: Re: Reply to: Rexx Program is executing infinite loop: Chunk
Reply with quote

Pedro wrote:
?? I would expect a continuation error at lines 18 to 19.

Logeswaran Audhikesavan wrote:
Hi Pedro - Recent code which I posted is working perfectly..

if I use " quotes in 18th line to end that, then its giving error. To make this continued I ensured the quotes has been closed in 19th line.

Code:
000018 "ALLOC DA('"DSNAME"') FI(OUTFILE)                       
000019   DSORG(PS) SPACE(1,1) TRACK LRECL(80) RECFM(F,B) MOD"

The behavior is easily understood. The ALLOC command is passed as a string to the TSO environment; an opening quote on line 18 with a closing quote on line 19 gives a string with a lot of whitespace in it, but a good string nonetheless.

A problem could occur if there's so much whitespace that the length of the string exceeds 250 characters. For that reason, I'd code this as
Code:
"ALLOC DA('"DSNAME"') FI(OUTFILE)",
"DSORG(PS) SPACE(1,1) TRACK LRECL(80) RECFM(F,B) MOD"

but the way that the TS did it will work under most circumstances.
Back to top
View user's profile Send private message
Logeswaran Audhikesavan

New User


Joined: 26 Mar 2013
Posts: 5
Location: INDIA

PostPosted: Thu Apr 25, 2013 11:10 am    Post subject: Reply to: Rexx Program is executing infinite loop: Chunk of
Reply with quote

thank you So much! for all the suggestions!!
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CLIST & REXX All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts IMS BMP program causes 878 system abend Artemk IMS DB/DC 7 Tue Nov 22, 2016 8:26 pm
No new posts Limit duplicate records in the SORT pshongal SYNCSORT 6 Mon Nov 21, 2016 12:54 pm
No new posts What is the command to check MODE of ... rohanthengal CLIST & REXX 6 Fri Nov 18, 2016 1:48 pm
No new posts How to split the records using the am... vnktrrd DFSORT/ICETOOL 24 Fri Oct 28, 2016 7:33 pm
This topic is locked: you cannot edit posts or make replies. Rexx to create GDG by scanning JJ result krish.deepu CLIST & REXX 5 Tue Oct 25, 2016 5:32 pm


Facebook
Back to Top
 
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us