Stack Overflow Evaluating Feeders

[JamiseBondi]

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

[BrianL]

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.

[declanr]

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?

[JamiseBondi]

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.

[Tilo]

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

[Tilo]

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

[JamiseBondi]

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.

[Gabor]

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.