TM1 Forum

Hi guys,

I've seen a few posts by various users who have had the stack overflow error (similar to this one):
TM1.Server Stack overflow evaluating feeders. Starting cell: APLS1[Opening Balance,B11_14,1,Chemtec,ZAR,GL999,2502188,Company CCY - CB]. Feeder: 13
My question is that this has happened to us only after installing the latest fixpack 2 for TM1 10.2.2

So we have 10.2.2 fixpack 1 (version of tm1s.exe: 10.2.20100.123) in Prod and QA. I then updated to the latest fixpack in Dev only making tm1s.exe version
10.2.20200.55
Now when I fire up the model that is in production I have no issues. It works as expected. When I take this same model back to Dev and try to start it up I get the stack overflow errors.

So the questions are:
If I really have a stack overflow situation why is the system coping with it in 10.2 fixpack 1? and not fixpack 2?
If I don't have a stack overflow then what is this error message referring to?
Thanks

If it's really the same exact data/rules running on the two servers, you should file a bug with IBM.

If the message only shows up in 10.2.2.2 there's either a bug in fp2 that's generating the error or a bug in fp1 that it wasn't generating the error.

The only think you can really do is double check your rule to make sure there are no circular references.

BrianL wrote: The only think you can really do is double check your rule to make sure there are no circular references.

Circular references in a rule would cause a rule to fail.
What you are really looking for is a long chain of cells fed from 1 to the other; considering you feeder is referencing "Opening Balance" I am assuming that this is an Opening to Closing to the next periods Opening and so on... this is THE classic cause of overflow in TM1; so it would seem quite feasible that it is a real error. If that is the case how many periods are in the model that would be hit by this?

Hi guys,

thanks for the suggestions.

Brian: I have filed a PMR with IBM and it's currently under investigation. Will report back when it's resolved.
I don't think there are problems with the rules as this runs fine in previous versions (from 10.2.2 fix pack 1 back to when the model was created in 9.4)

Declan: I appreciate your advice here, I hear your logic and we may well have to rewrite these feeders to feed more intersections in a single statement rather than "a" feeding "b" which feeds "c" which feeds "d" etc.... as per this link
http://www-01.ibm.com/support/docview.w ... wg21457414

So to avoid more work while we're under the pump with roll outs we've chosen to stick with fix pack 1 and are waiting to find out from IBM why the models work with fix pack 1 and don't start up with fix pack 2 and if it necessitates rewriting a lot of our feeders (which we'll do if we are forced to).
Will keep you posted.

3 APARS have been issued:

************************************************************************************************************************************************************************************
************************************************************************************************************************************************************************************

PI34483: TM1: STACK-OVERFLOW IN NEWER VERSION OF TM1
https://www-304.ibm.com/support/entdocv ... wg1PI34483

APAR status
• OPEN
Error description
• As per the client:??"We have upgrade one of our servers from
• 9.5.2 HF6 to 10.2.2 FP2 and one of our bigger instances will not
• start. We are getting stack over flow errors and will need some
• help trying to figure out the problem."
•
Local fix
•
Problem summary
•
Problem conclusion
•
Temporary fix
•
Comments
•
APAR Information
• APAR number
PI34483
• Reported component name
TM1 SERVER
• Reported component ID
5724W49SE
• Reported release
A20
• Status
OPEN
• PE
NoPE
• HIPER
NoHIPER
• Special Attention
NoSpecatt
• Submitted date
2015-02-06
• Closed date
• Last modified date
2015-02-09
• APAR is sysrouted FROM one or more of the following:
• APAR is sysrouted TO one or more of the following:
Fix information
Applicable component levels
Document information
________________________________________
More support for:
Cognos TM1
TM1 Server
________________________________________
Software version:
10.2
________________________________________
Reference #:
PI34483
________________________________________Modified date:
2015-02-09

************************************************************************************************************************************************************************************
************************************************************************************************************************************************************************************

PI34560: TM1 SERVER DOES NOT START UP. TM1 SERVER LOG SHOWS EVALUATION STACK OVERFLOW.
https://www-304.ibm.com/support/entdocv ... wg1PI34560

APAR status
• OPEN
Error description
• TM1 server does not start up. TM1 Server log shows Evaluation
• Stack Overflow. Server does not start at all using TM1 10.2.2
• FP2.
•
Local fix
•
Problem summary
•
Problem conclusion
•
Temporary fix
•
Comments
•
APAR Information
• APAR number
PI34560
• Reported component name
TM1 SERVER
• Reported component ID
5724W49SE
• Reported release
A10
• Status
OPEN
• PE
NoPE
• HIPER
NoHIPER
• Special Attention
NoSpecatt
• Submitted date
2015-02-09
• Closed date
• Last modified date
2015-02-16
• APAR is sysrouted FROM one or more of the following:
• APAR is sysrouted TO one or more of the following:
Fix information
Applicable component levels

Document information
________________________________________
More support for:
Cognos TM1
TM1 Server
________________________________________
Software version:
10.1.0
________________________________________
Reference #:
PI34560
________________________________________Modified date:
2015-02-16

************************************************************************************************************************************************************************************
************************************************************************************************************************************************************************************

PI34628: "STACK OVERFLOW EVALUATING FEEDERS" ERRORS ON STARTUP AFTER INSTALLING FP2 ON 10.2.2
https://www-304.ibm.com/support/entdocv ... wg1PI34628

APAR status
• OPEN
Error description
• Error is seen at startup after installing FP2 on 10.2.2 FP1
•
Local fix
•
Problem summary
•
Problem conclusion
•
Temporary fix
•
Comments
•
APAR Information
• APAR number
PI34628
• Reported component name
TM1 SERVER
• Reported component ID
5724W49SE
• Reported release
A22
• Status
OPEN
• PE
NoPE
• HIPER
NoHIPER
• Special Attention
NoSpecatt
• Submitted date
2015-02-10
• Closed date
• Last modified date
2015-02-10
• APAR is sysrouted FROM one or more of the following:
• APAR is sysrouted TO one or more of the following:
Applicable component levels

Document information
________________________________________
More support for:
Cognos TM1
TM1 Server
________________________________________
Software version:
A22
________________________________________
Reference #:
PI34628
________________________________________Modified date:
2015-02-10

We do have this Problem in 10.2.0 FP1 already - when we use conditional Feeders "too much".

thanks for the feedback on the APAR's. Great to know its not just us.
I'm hoping with the release of fixpack 3 in the next few months that this will be corrected as we've never had it in previous versions / fix packs.

There is an interim fix (IF4) available for TM1 10.2.2 FP2, which addresses the stack overflow error and a couple of other things like a scrolling issue with frozen header rows in TM1 Web. The fix resides in a private area of fix central, so you need to contact IBM support to get access to the files.