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Script runs manually, but not from cron

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Top Forums Shell Programming and Scripting Script runs manually, but not from cron
# 8  
Old 05-27-2016
Yes... Same error;


Code:
trcfile  dev_rout
 *****************************************************************************
*
*  ERROR       SNC processing failed:
*              SncInit
*
*  TIME        Fri May 27 13:43:00 2016
*  RELEASE     745
*  COMPONENT   NI (network interface)
*  VERSION     40
*  RC          -17
*  MODULE      /bas/745_REL/src/base/ni/nisnc.c
*  LINE        553
*  DETAIL      NiSncInit: sncrc=-1
*  COUNTER     4
*
*****************************************************************************

Last edited by RudiC; 05-27-2016 at 12:19 PM.. Reason: ... code tags ...
# 9  
Old 05-27-2016
Hmm. Hard to figure out from here. It must be something in the environment that is different. Maybe some variable not set. Maybe the different shell (Try to set SHELL=/bin/bash as first line your crontab).

I would try to dive deeper into problem with strace.

Maybe another member has some helpful simple tip of typical obvious interactive/cronjob problems.
This User Gave Thanks to stomp For This Post:
bredman
# 10  
Old 05-27-2016
I tried specifying the shell (both as bash and my default ksh), but get the same error.

---------- Post updated at 09:23 AM ---------- Previous update was at 08:10 AM ----------

Issue now resolved.

Many thanks to "stomp" for the pointer, re variables.

I found that running
Code:
env

showed an entry for
Code:
SNC_LIB=/usr/sap/saprouter/libsapcrypto.so

I added the line
Code:
env > /tmp/envcron

to my script and found that this variable was not set when running from cron (even though both cron and manual run is with the root user).

I added
Code:
export SNC_LIB=/usr/sap/saprouter/libsapcrypto.so

to my script and it now works perfectly.

Again, many thanks for the responses. This has been by very first forum post and I will happily use again!
# 11  
Old 05-27-2016
Quote:
Originally Posted by bredman
Thanks for your prompt responses.

This is a service that only needs to run for 15 minutes each day. There is another cron job to stop this at 10:15.

This is the output from the log file;

Code:
# more /tmp/saprouter.log
*****************************************************************************
*
* ERROR SNC processing failed:
* SncInit
*
* TIME Fri May 27 13:00:00 2016
* RELEASE 745
* COMPONENT NI (network interface)
* VERSION 40
* RC -17
* MODULE /bas/745_REL/src/base/ni/nisnc.c
* LINE 553
* DETAIL NiSncInit: sncrc=-1
* COUNTER 4
*
*****************************************************************************

trcfile dev_rout


According to SAP, this seems to indicate a problem with authentication. However, if I run the script manually, there is no error...

I should say, I also revised the crontab entry to include "nohup";

Code:
00 13 * * 1-5 nohup /usr/sap/saprouter/scriptname > /tmp/saprouter.log 2>&1




Moderator's Comments:
Mod Comment Better, but not quite there. Use code tags for data or output as well!
The most common reason for scripts that work when run manually, but fail when run by cron is that the environment provided by cron does not contain any of the setting usually initialized by your shell's start-up scripts when you login to the system.

In this case, from the error message above, it seems likely that you have initialized PATH to include the directory in which the SAP SncInit is located in your shell's start-up script, but have not set PATH the same way in /usr/sap/saprouter/scriptname. But, since you haven't shown us the entire script, we're just guessing at what might be wrong.
# 12  
Old 05-28-2016
Env problem ?
Add line
Code:
env > /tmp/sapenv.tmp

to the script and run manually and via cron. Compare env.

Make your env file
Code:
cd  /usr/sap/saprouter
env > myenv

Edit myenv if needed.

Add line to script to set env
Code:
.  /usr/sap/saprouter/myenv
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