Re: [foxboro] Unable to access Alarm History

Check your cpu usage as well.  I have had this problem when the process that 
acquires the real time points (process name escapes) starts misbehaving and 
consuming excessive cpu utlization.

I solved the problem by rebooting the historian box.

As stated below, you may also need to archive some of the older aim history 
files but I would try the reboot first.

Ken Dunham
DCS System Engineer
Fort Calhoun Station
Omaha Public Power District

________________________________________
From: foxboro-bounce@xxxxxxxxxxxxx [foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of 
Larsen, Ed [ed.larsen@xxxxxxxxxxxxxxxx]
Sent: Friday, January 30, 2009 10:36 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Unable to access Alarm History

How many messages files do you have?
I have seen where too many message files in Aim* Historian cause this.

From GCS knowledgebase:

Solution
Unable to access alarm history on Alarm History Display (AHD)
September 24, 2008




Problem Description

Unable to call up Alarm History Display (AHD) from Current Alarm Display (CAD). 
 Get the following message "unable to access alarm history for hist01 on
A1AW01'' or " Too many  historian alarms in database <histname> on <wsname>.   
Please archive your database


The AIM*API calls may timeout if there are too many alarms and return an error 
with no data to the AM. The AM displays the above message instructing you to 
archive.



Fix/Resolution
Ref to v8.2 release note B0700RN rev C sec 8.9.6 talk about issue with alarm 
history.  The solution describe in this release note and can also apply on your 
current v8.0 is to archive the message file in the historian database.  Can 
have up to 180 message (m###.fdb file) in your /opt/aim/inst/histname 
directory.  Ref to historian user guide to use manual archiver and then setup 
auto archiver. Q0302BR

 Steps to resolve your alarm history issue.

In /opt/aim/inst/histname
    m*.fdb is for all message file, meaning these are the alarm history
    r*.fdb for sample file, meaning these are the measurement value

Ref to AIM historian user guide in AIM 3.2.3 suite CD Q0302BR
    Use manual achiver and copy and delete m*.fdb file to ANY OTHER DIRECTORY 
beside /opt/aim/inst/histname, /opt/aim/pbk or any directory define in DBPATH 
(use histcfg >select instance cfg to check).  Only leave up to 180 m*.fdb in 
the /opt/aim/inst/histname directory.

When above steps are done, go to /opt/aim/bin and run " xrebuild histname 4 "  
......select ' Y ' to commit the system.

Re-launch alarm history, and alarm should appear.

When the issue is resolve, setup auto-achiver on the message file.  This will 
copy and delete you message file base on the schedule date and time.

Hope this helps.

Ed

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On 
Behalf Of Ali Ahmed Zahidi
Sent: Friday, January 30, 2009 10:07 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Unable to access Alarm History

Hi All,I am unable to access  alarm history in Alarm History Display (AHD) of 
alarm manager on Windows XP based P92 stations. I am getting the following 
message when AHD is invoked  "Unable to access alarm history for hist01 on 
01AW02"

We are using AIM*Historian for historical data collection. I have checked the 
historian instance hist01 for proper function. It is running properly. If 
anyone have some idea to solve this problem, please share.

Rgds,
Ali
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