When you execute a Planning Sequence and save data or enter data in a Planning Query and Recalculate or Save data, you get a short dump or error messages.
There are different kinds of exact errors. Common errors are like:
1. Error message: PE error 2.048: column store error: alterPlanningSession error:  ;Session 'tttttttttttttt_ttttttt' not valid.
2. Short dump:
Category ABAP programming error
Runtime Errors UNCAUGHT_EXCEPTION
ABAP Program SAPLRRMS
Application Component BW-BEX-OT
| The exception is related to the previous exception "CX_RSR_PE_ERROR" that |
| occurred in |
| program "CL_RSR_PE_ADAPTER=============CP", in line nn of include |
| "CL_RSR_PE_ADAPTER=============CM00O". The reason for this exception |
| was: |
| PE error 2.048: column store error: alterPlanningSession error:  Session |
| 'tttttttttttttt_ttttttt' not valid.
|PROGRAM |CL_RSPLS_DELTA_BUFFER_B |
3. Error messages:
Error reading the data of InfoProvider <INFOPROVIDER>$A
Error while reading data; navigation is possible
CL_RSR_HDB_IOBJ_PROP >> Row: Inc: 244 Prog: ENSURE_MD_ACCESS_MDRC_HANA
In SM21, you find system log: (This is very important as it helps to identify the exact problem location.)
Database error 2048 at EXE
column store error: alterPlanningSession error: 
;Condition 'theTargetType.getLength() ==
theSourceType.getLength()' failed. different length in
session column '/BIC/ZABC' and data source
"_SYS_BIC"."Z1/Z2" column 'XYZ'. target
length: n, source length: m
BW7.x, BW/4HANA, S/4HANA
PAK, theTargetType.getLength theSourceType.getLength, getLength, different length in session column, 38001, 38.001, 38,001, 3 8001, 2,048, 2048, target length, source length , KBA , BW-PLA-IP , Integrated Planning , EPM-BPC-BW4-PLA , BPC/4 - Planning Enginee , Problem
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