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====== Model Base Checking ======

===== Overview =====
Model Base checking is a process that cleans up any problems that may have occurred due to lost network connections, software crashes or other problems.

checkMB is a server side process should be run nightly as a cron job. It produces a report called MBchecker.rpt.

However, sometime it is necessary to run the checker before the nightly job.  Below are some typical cases and how to run it for these.

===== Various applications =====

==== cannot enter this model it is being checked ====
  * Log on as samm to your server
  * Make VERY sure everyone is out of samm and check with the command
<code> psamm </code>
  * Then run: 
<code> MBchecker -v /whatif/samm/<name_MB> </code>


==== cannot delete or check because there are users in it ====
  * Log on as samm to your server
  * Make VERY sure everyone is out of samm and check with the command
<code> psamm </code>
  * if there are still some samm servers running kill those processes with SIGHUP:
<code>
kill -signal SIGHUP <pid>
</code>

This alone might fix the problem if not do a check like any of the other topics here


==== out of licenses due to samm crashes and dangling servers ====
  * Log on as samm to your server
  * Make VERY sure everyone is out of the Model base because it can become corrupted if this is run while someone is in it. Check with the command
<code> psamm </code>
  * Then run: 
<code> checkMB /whatif/samm/<name_MB> </code>

==== I can't enter the modelbase at '/whatif/samm/Models_MB' because it needs to be checked!  Please contact your SAMM Administrator' ====
  * Log on as samm to your server
  * Make VERY sure everyone is out of the Model base because it can become corrupted if this is run while someone is in it. Check with the command
<code> psamm </code>
  * Then run: 
<code> checkMB /whatif/samm/<name_MB> </code>

  * If that fails try: 
<code> MBchecker -v -dirty /whatif/samm/Models_MB </code>
Using the -dirty option, MBchecker only checks model families with numUsers != 0 and may get the Model base functional again but the real
problem is not yet fixed.  At least other mf's will be useable though.
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